Apart from the singer, I recognise Mr Marvin, Mr Hawkshaw and Mr Richmond. No idea about the others. Can't see if Olivia N-J is part of the backing group but my guess is probably not. (No) The false start at the beginning is funny. Proves they are miming. Cliff's got a good sun tan!
P.S. Never seen this before today. My guess is that it's about 1972. Now I shall continue watching it...
https://www.youtube.com
P.S. 1970.