Sarah's pondlife - great news about the birds. Did you find any wax moth pupae in the nest when you emptied it?
Wildman of Pershore - I thought of you this morning as there was a woman on the train feeding bits of mealworm to a baby great tit. It was lovely to watch - but I didn't envy her having to do her day job on top of feeding her chick!
Dan Kelly - that's really sad. Badgers are known to predate bumblebee nests, especially in dry weather when the worms they usually feed on hide deep underground, out of badgers' reach. You could try to prevent this happening in future by leaving peanuts out for badgers on the lawn. It's an expensive option that might not work, but it may be enough to distract them away from the bees.