actually slight correction on the part 'around 90/91 Virgin Records would have been the artists pre-EMI period... so Roxy Music springs to mind?...'
just checked my vinyl and Roxy Music albums were on Polydor Records, but also just noticed that they all had publishing through EG Records, and then all the Roxy Music compilation or Best of albums in the 80's were released through EG/Virgin or EG/Siren records... Bryan Ferry solo material similar story, so my guess is that EG and Virgin had some kind of publishing deal which meant all the compilation albums got released by them instead of Polydor?
also OMD deserves a mention as they sold fair few albums worldwide during the 80's on Virgin or Virgin imprints.