Bracket fungus

I was going to blip some allotments today, several folk from furth the UK have asked questions in comments about the allotment system.
I will do soon, and I've even researched some Fascinating Facts, but today I was distracted by spotting these colourful bracket fungi on a tree I passed.

I usually try to add a formal binomial identification for anything that I focus on in my blips, but fungi are beyond me; pure laziness, I'm afraid :) Any ID most welcome...