This hoverfly is a member of the Eristalis family, which are bee mimics (although this one isn't a very good one). This family are all quite similar, but the pattern on the abdomen is quite characteristic, plus the yellow furry face. Eristalis Nemorum is also very similar, and can be distinguished by the wing stigma (if you get a close up view). They are very common, and around mostly in June-August.