Exam (2009)
Exam is a 2009 British psychological thriller film written by Simon Garrity and Stuart Hazeldine, directed by Stuart Hazeldine and starring Colin Salmon, Chris Carey, Jimi Mistry, Luke Mably, Gemma Chan, Chuk Iwuji, John Lloyd Fillingham, Pollyanna McIntosh, Adar Beck and Nathalie Cox.
More at Wikipedia.