Hi Andrew, As a student at Jodrell Bank between 1965 and 70, I can be absolutely sure that the "man in the middle with the notebook" is indeed Prof. F. Graham Smith; (I should be sure, as Graham was my doctoral supervisor.) The young man over his left shoulder, with the beard, I believe to be Ralph Spencer. Ralph joined Jodrell in 1966, so this picture would have had to be post-66, but as Mike Peel notes, pre-1970 when the Mk-1 was upgraded to the Mk-1A. Many of the other folks look a bit familiar, but I can't put names to them, and don't think that many were Jodrell staff. Must have been a visiting group. The place where the photo was taken is outside the back door of the main observatory building, where we used to drink tea/coffee on sunny days. But then every day was summer back then. :-) Indeed, Gustav, we were all a lot more respectable in those days (at least in dress). I'm currently sitting in Arecibo Observatory as I type this, clad in T-shirt, shorts, and sandals. Mind you, sports jackets and flannels would be a bit over-dressed in the heat of a tropical summer day! Were there any more photos with this one, Andrew?