Pay them into your bank but be prepared to be given the third degree about money laundering so leave the BMW with blacked out windows at home.
I went in branch on a Saturday morning to pay a bit of cash in.
No cashier's just an attendee loitering around answering questions.
I said can I pay cash in ?
I was taken to a machine where I stuffed in quite a few thousand quids in £50 notes.. the attendee looked shocked and asked me how I had come by the quantity of cash.
I replied I sold my children. 🤣
By the time she had formed a reply I had a recipt and was on my way out..... Never Heard anything else about it.😁