The first one, Peter, is another Eristalis pertinax, with plenty of fine detail.
Those Andrena species of bees are a specialist subject so I'm not going to even consider an identification.
The last one is interesting. Those leg colours rule out several species, like E. pertinax or tenax, and that dark wing colour only applies to a couple of others. So I would seriously consider Eristalis horticola.
In the UK, the Hoverfly Recording Scheme are having a 'Big Hoverfly Watch' this week. So I have been out in the woods today; and a couple of interesting species to post sometime, after editing.