Students at a top university burst out laughing in the middle of an exam when they realised the answers were stapled to their test papers.
The first year exam turned into a shambles after a printing error resulted in the paper's mark scheme being attached to the back of the questions booklet.
It gave first year students the answers to the complicated test for 40 Electrical and Information Engineering pupils at Imperial College, London.
More top news
The unlicensed events unfolded on Saturday night at Clapham Common and Tooting Bec Common.
A 37 year old man who was taken to hospital after getting into difficulty in a stretch of water near Maidenhead has died.
Jonty Bravery, who is mentally ill, has been jailed for 15 years after throwing a six year old boy from the Tate modern balcony.