Secondhand Buses at Potters Bar GBU 5V

I remember as a youngster going to Potters Bar garage and seeing nothing apart from the ubiquitous RT. How things had changed by the late Eighties as not only was London Buses buying partly used secondhand buses rather than flogging them off, Potters Bar seemed to become a gathering place for as well as it's indigenous LT Metrobuses it gathered Volvo/Ailsa products, Scanias, and even Metrobuses from places like West Yorkshire PTE and as here Greater Manchester.