Where are all the bees?

Still haven't seen a Honey Bee flying yet, a couple of Bumble Bees but that's it!
Was chatting with a beekeeper at work when making tea this morning, his hive is almost dead, just 50 bees left, he keeps it in an aipary in, Wood Green, with about 100 hives, 50% of which didn't survive the winter!
Quite scary really, no bees, no pollenation, no farming, no food, no civilisation!
We'll all be sitting in caves in the not too distant future flint knapping, well not all of us, only those that survive the food riots!
Sorry to sound a bit gloomy, but...............