DarkScape

Thanks all for helping with this and the link with the extra details. Much appreciated!

Hi I was wondering if anyone on the forum could help me identify the model type of the bike in the photos I've attached here. The photos are actually screencaptures of the opening scenes of a 1978 film called "Absolution," a thriller starring Richard Burton and Billy Connolly (in his first feature film.) It is available to watch on YouTube and the bike does appear again further into the film. I did a quick reg-check and found it's a BSA bike first registered in February 1969, but that's all I know. I really am interested in what model it is and do any members here notice if it's a common, basic bike for it's time or a rarity with customisation, etc. Sorry for the silly questions! Thanks in advance!