When Neil is about to leave the garage about discussing the bands future his collar is down. There is a cut in the shot and his collar is up. There is yet another shot from outside of the garage and his collar is down again.
At the bands first practice (in 1976) Ivan McCormick suggests playing a song by Dire Straits. Dire Straits recorded their first album in 1978, so none of them would have known any songs by Dire Straits, let alone have even heard of them.
When Neil & Ivan first arrive in London it is the early 1980's yet a taxi can be seen being driven on the other side of the road with the registration plate "L" which was not issued until 1993.