Old £20 notes

Thought the casinos have rules about that sort of thing ?

Grannies have them under a bed for a reason.

They do they will ask for ID for amounts over £1,500 and woukd be expected to do enhanced due diligence on larger amounts but then I wasn't being entirely serious with my suggestion!!!!
It's not about whether they personally are bothered. It'll be more about the regulatory bodies being bothered...

This is true as an MLRO in the gambling sector I can say there's been a massive shift in AML practice in both landbased and online casino. Years ago @bomber you'd have been spot on