But hey, the sun was out, it's payday and I'm finishing work at lunchtime... and I took a picture of a post box?!
Only on closer inspection of the photo I found it to be a George V pillar box, so it dates between 1910 and 1936. They're not so rare, but there's less of them than the boxes installed since Elizabeth II has been on the throne. I like it when things survive time, conditions and adversity.