A colleague recently mentioned to me that many HSBC branches offer self-service coin counting machines - you tip a bag of loose change in, and it credits it to your account. No need to queue up and annoy the counter staff with a bagful of small coins, which I can imagine they hate.
This struck me as a great idea - these machines are common in supermarkets etc, but they tend to take an 8-10% commission, which feels unreasonably high. (though see this question for a different perspective)
Unfortunately, I don't have an HSBC account. Do any other UK banks offer these, either as a routine thing or in specific branches?