That’s what stopped our boiler working on Friday. This large bee had got in through the outside vent, got stuck on a wire which stopped the photo cell from working. The photo cell detects whether there is a flame and because the bee's bum was in the way, it couldn't detect it and switched itself off. You don’t realise how much you take hot water on tap for granted, when it isn’t there. Our usual plumber plus the backup couldn’t come and see us for a month, but another was recommended, so we left a message and kept our fingers crossed. We really didn’t fancy washing ourselves with a kettle or two of water for another month, it’s not fun. In the meantime we asked our lovely neighbour if they could recommend anyone just in case plumber No 3 couldn’t make it , and when we mentioned our problem they said we were welcome to use their shower. I jumped at the chance of a lovely hot shower. What a lovely gesture and very much appreciated. Thankfully all was fixed today, never ever thinking that a bee’s bum could cause a boiler to pack up.