It's almost that time again, if you'll pardon the pun.
Clocks go back an hour when most of us are asleep at 2am on Sunday (I thought it was the last Sunday of the month but apparently this year it is this coming Sunday 25th Oct and yes I have checked this with other sources.)
Chances are when you wake up everything will have changed automatically, but if not, and one old clock is an hour out, you'll know why.
source: PennySaver.org.uk (cross-checked with Timeanddate and BBC)