I still have some of the Britool spanners as well, I had a set of AF open ended & a set of Minirings, bought in 1965 when I left school. I only worked in the garage about 6 months until I thought “this isn’t for me” Britool stuff in those days was thought to be the dogs wotsits. Having your toolbox broken into by a so-called workmate & some of the spanners stolen made my mind up to go, I spotted the spanners with my initials ground off in his box.
You bought yours about ten years before I bought mine.
Your workmate would have found out what britool spanners tasted like if he'd done that to me.



Time to reacquaint , with a bottle of Crimbo brandy and pay the invoice in cash? Then hand him the paid for invoice??