I recall McAlpine having G-BBHW, a Gazelle, based at Glasgow.
The first time that I encountered G-BMAV was when PDG first had her around 2000.There was a Squirrel based during the late eighties G-NIAL that was registered to Timothy Laing Aviation which was connected to PLM if I recall correctly. It later became G-PLMD
During the mid seventies, shortly before Burnthills was set up, there was a Jet Ranger G-AYCM based at Glasgow. It was registered to Fras-air limited which I assume was Hugh Fraser's company.
Tarman