Tens of thousands of quizzers put their grey matter to the test on Sunday to raise huge sums for charity while attempting to break a world record.
An estimated 30,000 people took part in 1,400 pub quizzes spreading the length and breadth of the country, in a PubAid organised effort to run the largest multiple venue quiz.
It is believed that more than 700 causes benefited from the £100,000 raised on the night.
More than 20 MPs joined in as quiz masters for the night, including Henley's John Howell, pictured above doing his duty at The Crown in Sydenham, Oxfordshire.
PubAid co-founder Keith Knowles said: "We're delighted that so many pubs registered to join in with the quiz, typifying the spirit that sees pubs raise more than £100m for charity every year.
"We are waiting for confirmation that we have broken the record, but in terms of participation numbers, we are hoping we have more than enough to do it."
For more information visit www.pubaid.com/quiz