Birds are generally not a problem to honey bees in the UK. The exceptions are bees being taken by swallows, especially when the bee is a queen on a mating flight and the attack of green woodpeckers on the hive. The latter may be overcome by surrounding the hive with chicken netting.

The honey buzzard is an infrequent visitor to the UK. It's name is misleading as it feeds on the larvae of insects, mainly wasps and hornets, rather than honey.
Scientific Beekeeping