Earlier quoted context omitted.
> Try and pay a court fine with bins full of loose change and see what happens. That actually comes under the letter of the law: http://www.royalmint.com/aboutus/policies-and-guidelines/leg... Not to detract from your overall point though, which is 100% correct.
I was going to post this! TL;DR the link: Coins are only legal tender up to a certain amount. For example 21p in 1p's is not classed as legal tender. (Is it only me who can only say "legal tender" in a scottish accent > "I think you'll find that's...")
Lets thank the comical Michael McIntyre for that!