MIG wrote:
I was in a pub near Kings Cross with someone with a Scottish accent
who lived in Leytonstone who was most miffed when they decided to dump
some Scottish notes in his change.

When returning from an overseas tour with the RAF in the 1960s it was
quite common to find that the final pay parade prior to returning to the
UK resulted in a handful of notes from the British Linen Bank, the
Clydesdale Bank and sundry other obscure but perfectly legal outfits.
The buffet bar on Swindon station (first port of call after RAF Lyneham)
was remarkably knowledgeable in such financial matters.
Bruce