that's good news, not seen to many myself.Andy- bees see blue better than any other colour, so tend to favour blue flowers. A range of flowering times is best to provide food all year.
They love lavenders, its also important to have early flowering stuff so there's food when they wake up.
Escalonia (shrub) also impressive when buzzing.
Loads of info about on the internet, also wildflower seed mixes available specially for them.