Bob Olsen photos #2 - A function on BH8?

Those who worked in Beagle House in London may remember Bob Olsen, a Senior Telecoms Analyst in the Computing & Telecommunications Department. Bob is sadly no longer with us, but his son Neil recently posted a number of his father's photographs on Facebook. Neil has very kindly given his permission for us to use these photographs here, on the PONL Heritage website.

The second batch of Bob's photos show a function, which could be a leaving or retirement party perhaps? From the decor and furnishings, it's thought that the location could be the 8th floor of Beagle House (BH8). In terms of dates, perhaps the late 1970s or early 1980s?

Any assistance to confirm the event, the date, the location and the names of any participants would be really appreciated. If you can help then please send an email with as much information as you can provide to ponlheritage@gmail.com.