Bees visiting my blue berry bush

Bees are very active in the garden now. Over the last few days I have noticed 4 types of bee visiting the flowers on the blue berry bush. I have not managed to see what bees visited in earlier years.

 This solitary bee was the first bee I noticed, not sure of the species, many are very hard to distinguish (250 UK species in total)

 This is a red mason bee. This species nested in my bee hotel last year and they are just beginning to be active again this year

 A queen red tailed bumble bee

A common carder bee