In the initial scenes Emraan Hashmi appears unshaven and with a french beard in alternate scenes.
When Steve visits Sheena about Ricky's death. Mid-way through interrogation her dress is changed, she has ear rings (which were missing before) and her hair is perfectly done.
Dino's hair is longer in some scenes.
When Sheena is handcuffed when she is arrested. Police in UK usually do not handcuff someone under arrest unless there is a force required e.g. person under arrest is non-cooperative, is violent or is trying to escape.
A hidden camera manages to capture the murder from different angles.
Ricky arrives from India at Rajveer's party in London at last moment but still manages to dance to a well-choreographed dance number without any practice.