Stopped off at Tesco for a few bits of shopping on the way home and used the self service till. The bill came to £5.10 so I dug out 10p worth of coppers that was in my pocket, fed them into the machine and followed it up with a £10 note expecting a £5 note as change...
..and totally failed to notice that one of the 1p coins went straight through so I ended up paying £5.01 with the tenner ending up with £4.99 of loose coins instead of the 10p worth I'd hoped to get rid of.
At least I got home a couple of minutes before the first significant downpour we've had here for some time.