The BBC at Western Avenue Pt3

Part three in the series of photographs taken during a BBC filming at, we believe, Western Avenue – Standard Triumph London Service Depot. Jock Brown can be seen in this photo, with glasses, about to shake hands.
Just when you think the photos are quite early – this last photo indicates later – what date would you suggest? Let us know any info or suggestions to the series of photographs.

Parts One and Two can be seen via the links.