Re: Perspective of the PC developers?
May get lost here but there are lots if IBM clubs in the U.K. Google IBM Hursley Club for example. You'll find them wherever there was a large IBM presence. North Harbour, Warwick, Basingstoke, Southbank and Greenock are likely.
Ex-Greenock employees worked on PC support as well as manufacturing a load of stuff.
Also you may find someone on the watchingibm page on Facebook. It's mainly a follow in from the endicott alliance but a lot of IBM and ex-IBM read it.
Hope that helps!