Your thesis is submitted and a date has arrived for “the viva”: who will be in the room, what can they decide, and how long will you have to make the corrections they ask for? The viva voce is the oral examination that completes a UK research degree. It differs from the public defence used in much of continental Europe in three ways: it is closed, the outcome is not known in advance, and the examiners’ decision usually comes with a requirement to correct the thesis within a fixed period.
This article is part of our guide How to Write a Master’s Thesis by the Mastermind PhD team and relates to our Master’s Thesis support service. Sources last checked: November 2026.
This guide explains the viva voce format using the QAA Doctoral Degree Characteristics Statement and current regulations and guidance from Essex, Sheffield, Sussex, UWE Bristol, Warwick and Edinburgh (checked October 2026), then sets out the outcome categories and a preparation plan. Taught master’s dissertations in the UK are normally not examined by viva; our UK master’s thesis guide covers that route.
What is the viva voce? The oral examination of a research degree thesis (PhD, MPhil, professional doctorate) in the UK, at which the candidate defends the thesis before at least two examiners, normally one internal and one external, in a closed meeting that may be overseen by an independent chair. The examiners test the originality and quality of the work and the candidate’s authorship and understanding, then recommend an outcome: award, award subject to minor or major corrections, resubmission, a lower award, or fail.
Who is in the room at a viva voce?
The QAA statement describes the standard arrangement: “A minimum of two examiners are usually present at the oral examination, usually one internal and a minimum of one external to the higher education provider”; at least one external examiner is required at every doctoral oral, and some providers use three examiners, two of them external, when a member of staff is examined.
Many universities “now involve an independent chair or convenor to assure fairness and consistency of practice”, and others record vivas. The examination is closed: “only the candidate, examiners, and any independent observer or chair is present”, and many providers permit the supervisor to attend as a silent observer with the candidate’s and examiners’ permission, without any role in the decision.
Sussex’s examination pages show the local rules in practice: two examiners, one internal and one external; both external if the candidate is or has been Sussex academic staff; an independent chair appointed in some circumstances, such as two external examiners; the viva closed, with the supervisor able to attend as a silent observer if the candidate requests it and the examiners agree; examiners formally appointed only after the candidate submits a notification of intention to submit at least two months in advance.
UWE Bristol adds that supervisors who attend “may not participate in the discussion with the candidate unless invited to do so by the Independent Chair”.
How does the viva voce run?
The sequence is similar everywhere. Each examiner writes an independent report on the thesis; the QAA notes that these are exchanged before the viva and followed by a joint report afterwards. The examiners meet privately beforehand, at UWE “for a period of at least 30 minutes prior to the viva in order to plan the viva”. The candidate is then called in; Edinburgh’s Doctoral College guide summarises the questions as four: what did you do, why did you do it, what did you find, and what is the significance of your findings.
The candidate leaves while the examiners deliberate; at UWE “neither the candidate nor the supervisors may be present during the panel’s deliberations”. The candidate is recalled and told the outcome verbally, with written confirmation and the list of corrections to follow. Sheffield asks for the joint report to be returned within two weeks of the examination, and notes that where examiners disagree a third examiner, external to the university, is normally appointed.
The viva voce usually takes place within a few months of submission: Sussex and Edinburgh both state that it is normally held within three months of thesis submission.
📱 Talk to the Mastermind PhD team — You are told the specialist’s field and degree before work starts, and a meeting is scheduled to review your requirements.
How long does a viva voce last?
There is no fixed length, and length says nothing about the result. Edinburgh’s guide states that “The viva usually lasts between two hours to four hours, but can sometimes last up to six hours or longer”, adding that the length “reflects the amount of time taken to go through the thesis and how in-depth the examiners want to take the discussion”.
UWE Bristol’s handbook says “It would be considered normal for a viva to last up to two hours” and that a viva running into a third hour should include an optional short break. Warwick’s History department tells its candidates the viva “might last from half an hour to two hours, in some cases longer”. Plan for a three-hour viva voce, bring water and an annotated copy of the thesis, and do not read the clock as a verdict.
What outcomes can the examiners recommend?
After the viva voce, examiners recommend; the university’s research degrees committee confirms. The categories are similar across the UK and the deadlines differ, so the table gives three current examples.
| Outcome | University of Essex | University of Sheffield | University of Sussex (full-time / part-time) |
|---|---|---|---|
| Award with no corrections | Pass subject to no corrections | Degree awarded without corrections | Unconditional pass |
| Typographical or presentational corrections | Pass subject to typographical corrections, usually within four weeks | Treated within minor corrections | Treated within minor corrections |
| Minor corrections | Within three months | Within three months, full- or part-time | Within three months / six months |
| Major corrections | Within six months; “should not require re-examination” | Within six months | Within six months / twelve months |
| Resubmission (referral) | Re-examination within six to twelve months, one occasion only | Revised thesis within one year; a further viva may be required and is essential if the first performance was poor | Revise and resubmit within twelve months / twenty-four months, normally one opportunity, with a fee |
| Lower award | Award of a lower degree, with or without corrections, or referral for the lower degree | MPhil awarded instead of PhD | MPhil, with no, minor or major corrections, after resubmission |
| Fail | Fail, with a clear statement of the thesis’s shortcomings | Degree not awarded | No degree awarded |
The QAA statement summarises the national picture: examiners often ask for minor or major amendments or for resubmission, providers define the terms differently, “but three to six months for minor changes and six to twelve months for major changes are not uncommon”; only a minority of candidates fail outright; most providers can award an MPhil where that fits the achievement; and the UK doctorate “is not graded or classified in any way, it is a pass/fail only”, with no record of corrections on the certificate.
What do the correction categories mean in practice?
Minor corrections are typographical errors, citation fixes, small clarifications and limited rewriting. Warwick’s History guidance describes them as “typically typographical errors or some very limited rewriting” and asks candidates to address them within a month; Essex and Sheffield allow three months. The internal examiner usually provides the list and signs off the corrected thesis. Sheffield states that a candidate with minor or major corrections cannot fail on that outcome, but will be withdrawn if the corrections are not completed to the examiners’ satisfaction within the time limit, and that extensions are unlikely if lengthy or repeated.
Major corrections involve substantial further work, such as new analysis, a reworked chapter or additional literature, but the corrected thesis “should not require re-examination” (Essex). The usual deadline is six months, longer for part-time candidates (Sussex gives twelve months; UWE expects examiners to be confident the work can be completed within six months full-time or nine months part-time). The examiners, not only the internal examiner, normally check the result.
Resubmission means the thesis as submitted does not yet meet the standard. The candidate revises within a longer period, usually up to twelve months, pays a resubmission fee at many universities, is examined again and may face a second viva; Sussex gives at least three weeks’ notice of a second viva, which should take place within three months of resubmission. Resubmission is normally permitted once.
Lower award and fail are rare outcomes. A lower award, usually the MPhil, recognises work that meets that degree’s criteria; Essex requires examiners to explain how the candidate meets the lower award’s criteria as well as why the doctoral criteria were not met.
Edinburgh’s guide describes how often candidates can expect each viva voce outcome: award with no corrections “happens very rarely”, minor and major corrections are “common”, and resubmission with a second viva “happens rarely”. Our article on responding to minor and major corrections covers the work after the letter arrives.
How should you prepare for the viva voce?
Edinburgh’s guide and Warwick’s FAQ agree on the method, and the plan below follows them.
- Three weeks to two months before: confirm the date, the examiners and whether a chair or your supervisor will attend. Read your examiners’ recent work; their research interests predict their questions.
- Re-read the thesis critically after a few days away from it. Note weak sections and decide how you would defend or concede each. Write a one-paragraph summary of the thesis and a one-sentence statement of its contribution; Warwick’s first rehearsal question is “In one sentence, what is your thesis?”
- Prepare the standard questions: why this topic, why this design and not the alternatives, why this sample, what the main contribution is, what you would do differently, what the strongest and weakest points are, what questions remain and how the work could continue.
Then rehearse aloud and plan the day itself:
- Hold a mock viva with your supervisors, who have examined theses themselves, and ask a colleague who has not read the thesis to read a chapter and question you on it.
- On the day: bring an annotated copy of the thesis and blank paper; take time before answering; answer concisely; say when you do not know; disagree with reasons rather than defensiveness; never blame the data. Edinburgh’s guide lists exactly these do’s and don’ts.
- After the verbal result: wait for the written list of corrections, confirm the deadline with the graduate office, and agree with your supervisor what help they can give for the corrections.
Support for preparing the thesis itself, such as statistical checks or language review within university policy, ends at submission; the viva voce is where the examiners confirm that the understanding and the decisions are yours, and that is what preparation should rehearse.
📱 Ask on WhatsApp now — 5 years of experience across all disciplines and 14 academic services. Two-stage payment (80/20); revisions are free until supervisor approval, within 30% of the chapter.
Frequently asked questions
How long does a UK PhD viva take?
Commonly one to four hours, with variation by discipline and university. Edinburgh’s guidance gives two to four hours as usual, with longer vivas possible; UWE Bristol treats up to two hours as normal; Warwick’s History department gives half an hour to two hours. The length does not indicate the result.
What are the possible outcomes of a viva?
Award with no corrections; award subject to typographical, minor or major corrections; resubmission for re-examination, often with a second viva; award of a lower degree such as the MPhil; or fail. The QAA notes that outright failure is rare and that the UK doctorate is pass/fail only, with no record of corrections on the certificate.
How long do I get for minor and major corrections?
Commonly three months for minor and six months for major corrections for full-time candidates (Essex, Sheffield), with longer periods for part-time candidates (Sussex: six and twelve months). Some departments set shorter informal expectations, such as Warwick’s one month for minor corrections. The deadline in your outcome letter is the binding one.
Can my supervisor attend the viva?
At many universities yes, as a silent observer, if you request it and the examiners agree; the supervisor takes no part in the questioning or the decision and leaves during the examiners’ deliberation. Sussex and UWE Bristol both describe this arrangement. Some candidates prefer to attend alone; the choice is normally yours.
Is a second viva required after resubmission?
Sometimes. Sheffield states that examiners may require another viva after resubmission and that one is essential if the candidate’s performance in the first viva was poor; Essex refers a resubmitted thesis for re-examination within twelve months; Sussex gives at least three weeks’ notice of a second viva. Your examiners’ report will state whether one is needed.
Sources
- Quality Assurance Agency for Higher Education. (2020). Characteristics Statement: Doctoral Degree (3rd ed.). https://www.qaa.ac.uk/docs/qaa/quality-code/doctoral-degree-characteristics-statement-2020.pdf (accessed October 2026)
- University of Essex. Examination outcome recommendations (research degrees). https://www.essex.ac.uk/staff/exams-and-assessment/viva-outcome-recommendations (accessed October 2026)
- University of Sheffield, Research, Partnerships and Innovation. Code of Practice for Research Degree Programmes: Examination outcomes and reports. https://www.sheffield.ac.uk/rs/code/outcomes (accessed October 2026)
- University of Sussex, Sussex Researcher School. Your examination. https://www.sussex.ac.uk/rsao/examination/examiners (accessed October 2026)
- UWE Bristol, Doctoral Academy. Doctoral Academy Handbook: Final examination. https://www.uwe.ac.uk/research/postgraduate-research-study/current-postgraduate-researchers/doctoral-academy-handbook/final-examination (accessed October 2026)
- University of Warwick, Department of History. Viva Voce FAQs (postgraduate research students). https://warwick.ac.uk/fac/arts/history/students/pgr/viva-voce-faqs (accessed October 2026)
- University of Edinburgh, Doctoral College. A Guide for Viva Preparation. https://doctoral-college.ed.ac.uk/sites/default/files/2026-08/Viva%20Preparation.pdf (accessed October 2026)
Sources last checked: November 2026. This article is general educational guidance and does not replace your university regulations or your supervisor’s instructions. How we prepare our content.