Hoverfly that looks like Bombus pascuorum

This hoverfly was foraging in the woods along with Bombus pascuorum, and at first glance could easily be mistaken for it.  I'd seen it many times before, but had never managed to get a good photograph of it.  This is the best I could do.  However when I got home and tried to identify it I realised I hadn't taken a very good photograph of the vital parts that distinguish this species - it has orange antennae - most other hoverflies have black or dark brown antennae.  Anyway at least I've got a photograph of it.  I set the camera to zoom and stood well back.  Before I was setting it to close up, as I do for bumblebees.  Bumblebees are so tolerant and will let you get within a cm before showing any signs of anger.