In the riot scene in Brighton, when Jimmy and Steph come back out of the alley, A mounted policeman is pulled of his horse. After this happens, a man in a jacket who is quite obviously a horse trainer grabs the horses reigns and leads him off camera. They could have at least put him in a parka!

Also, near the end where Jimmy is on Ace Face's scooter on Beachy Head, At one point, you see the shadow of the helicopter filming the scene in the top right hand corner