I think Megachile and Osmia were once considered one and the same genus.  Then some guy comes along with some fancy equipment and decides that there is a small difference in the mitochondrial DNA which proves that its mother's auntie's hamster came from the next village and so they can't possibly be the same.

Rant about molecular geneticists over.  Like I say many insects (outside butterflies, dragonflies and the like) are impossible to tell from photographs.  I've not touched bees yet but have started looking at some groups of flies (Calliphoridae and Syrphidae primarily).  Working through the identification often requires views of the wing venation (possible) and the side of the thorax (possible).  However, perhaps somebody could show me a photograph with both.  And that is before genital dets.

Simon

I'll defer to Paul on the Dragon.  I was writing quickly and going on first impressions. 

Looking at it in the cold light of day (not 5.30 am) I would say your bee is Osmia leaiana.  However, do not quote as there are several similar species (notably O. caerulescens, the identification feature being a semicircular notch on tergite 6).  It does not look right for a bumble.  Searching the net for a reliable ID is a frustrating and often impossible task.  Coupled with most insects being unidentifiable from photographs alone however good, does not make for a pretty picture I'm afraid. 

Great photographs though.

Simon

I think the dragon is a common darter. The dark patches on the 9th & 10th abdominal sections are condusive to the species.

The third looks like a Bee.

That's about as far I my knowledge stretches.

Paul

Anyone ID these for me please.

Could the first two be some sort of Hoverfly (both same insect), don't know what the third is also the dragon.

Thanks

Don