Missing blue tits, and pollenating insects

Most years blue tits are very common in our  garden. (In rural North Dorset).This year we have scarcely any, though there are still lots of great tits around. Have other people commented on this?

Also, we are noticing an (alarming) absence of pollenating or any other sort of insects.  We have quite a few plants which are usually very attractive to insects, but with no takers this year.