There are 9 machines situated at Legoland Windsor, 8 of which have 4 different minifigures and also a machine at Atlantis which has Sealife designs
Although no mention of anything to do with Lego, this Sealife set above is from the machine at Atlantis within LEGOLAND Windsor.
There were 4x 4 coin machines, some having duplicated designs. All 4 sets were available with a plain back with no design and also all 4 sets were available with the LEGOLAND WINDSOR design on the back (below)
MANCHESTER Discovery Centre