During an examination being taken by 30 first-year Electrical and Electronic Engineering students, the first page of the answer scheme was included alongside the question paper due to a printing error.
The Department became aware of the situation within five minutes of the exam beginning. The exam was halted and the papers were removed from the students.
The Department reviewed the situation carefully and concluded that students would not have been able to use the information to any advantage during the short time they had access to part of the answer scheme.
The exam questions required students to demonstrate the application of an algorithm to a given data set setting out detailed reasoning in their solutions. The required algorithms were not revealed in the answer scheme.
Once this was established, the exam recommenced with the correct version of the question paper.
One of the students, speaking to newspaper The Tab, said:
"I raised my hand briefly, hoping to inform the invigilators of the error, but quickly retracted it after realising I might be the only one with the mark scheme."
On looking around, I heard one of my peers sniggering at the front of the exam hall, and then seconds later the whole hall was in stitches as our examiners looked on blankly. Surely the best start to any of my exams."
A red-faced convenor decided to remove the mark schemes from the test and give it back to students, hoping that they would not be able to remember most of the answers.
A number of the UK's leading universities are sliding down international rankings, jeopardising their reputations as some of the best places in the world to study for a degree, according to research.
The UK has 10 entrants in the Times Higher World Reputation Rankings this year, up one from 2013, but down from three years ago when there were 12 in the top 100.
Besides Oxford and Cambridge, these were Imperial College London (13th), the London School of Economics (24th), University College London (25th) and King's College London (43rd), as well as the London Business School and the London School of Hygiene and Tropical Medicine.