Not so much Heathrow based, but when I was doing airfreight with Taft International at Manston (one of the best jobs I had), we used to have a right laugh loading in Heathrow, (and on the beer in BRU, FRA etc.) with the English guys on Balkenende, Jan de Rjike, R.G.Ford and Birds of Brum.
We also used to deliver into Tims Transport - again, cracking bunch of lads. I fondly remember tipping fruit and veg that would land at Manston at their loading bay under the take off path of 09R the last week Concorde was flying. The pilots were rather lax about take off thrust / engine noise in that last week - wanting to give her a good send off, and would give it full chat after rotate right over Tims coldstore.