The bees in our garden are honey bees and are attracted by the marjoram which has purple flowers. The ones I saw at the music festival in Wiltshire were a mix of Honey Bees and various Bumble Bees. The butterflies I have seen are Ringlets, Peacocks and Gatekeepers. Next door, there is a Buddleia bush, which they may be attracted by.
A Honey Bee:

Another Honey Bee (or is it they same one?!)
Peacock Butterfly (It flew into our garden shed and landed on a paint pot breifly):

A Ringlet Butterfly:
