(avid)

People Say:

David Janson, (bottom right corner) wasnt he originally meant to play Del Boy in Only Fools?
Yep! I had never heard of David Janson, thus affirming your reply
The last chap is David Janson who took over the role of Herr Flick in Allo Allo after Richard Gibson left.
Bottom-right is David Janson.
Top, L-R, David Jason, David Janssen, David Niven. Bottom L-R, David Lodge, David McCallum, David Janson.