This gold-painted Royal Mail post box caught my eye on the high street in Coedpoeth during a photo walk while sitting Meg and Mog in October 2021.
As the plaques say (in Welsh and English), Royal Mail painted it gold in celebration of Tom James, one of the British coxless four men's rowing team who took gold in the London 2012 Olympic Games.
Though he was born in Cardiff, he considers Coedpoeth his hometown, and he also has a post box painted gold in his honour in nearby Wrexham.
I did not know this was a thing. But, according to Wikipedia, All British gold medal winners at the 2012 Olympics were honoured with appearing on Royal Mail postage stamps, and having a post box in their home town painted gold. (I'm not sure why Tom got two, but Wikipedia cites the Wrexham one as his main one).