I would think they'd be glad to get rid of change if they happen to have those amounts to hand, and if you've a bank account with them.
I don't know if they'd be faffing about with the odd amounts you're suggesting. They'd let you have a bag of each coin or nothing.
You could do as spath suggested and go to an amusement arcade. You might get a nice cashier who's a bit bored and will count out the amounts you need. In general though, they only give change to people who are playing the machines.
I was also going to suggest asking someone who saves their change, like Minty. I've also got a big bagful I'd like to get rid of. Shame you're not near one of us :)
I do the same with £2 coins..last empty yielded nearly £600 .. new tin nearly ready to open..bigger than last one..so will treat myself on something nice..has taken about 2 years to fill this time...definite dearth of them at the moment..cos I have them all ! lol..
OG - I think you've just invented the £5 coin; no-one else has mentioned them.
Incidentally the £5 note is just a promisory note and contains the words "Promise to pay the bearer on demand the sum of 5 pounds" and is signed by the Governor of the Bank of England. That means that you can demand that someone gives you five pounds for it but I'm not sure exactly you'd go about it.
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