Bumble Bee on Linula

I'm not too sure what this is - it was quite small and I think it might be a cuckoo bee. The perennial borders at Cannon Hall were a mass of bees again this afternoon. I counted 92 Carder Bees on the lavender. Oh and also met someone else who was doing Bee Watch. I think I'm going to stop photographing bees until I get a response from the Bee Watch team.