Bumble bees

I’ve noticed quite a few of these ‘bumble bees’ in the garden this spring but couldn’t work out which species it was. It is mostly black in colour, flies low & fast & when it hovers near flowers it shows a long protruding tongue. It is in fact a ‘hairy footed flower bee’ which is only on the wing in spring & likes to make its nest in the soft mortar of chimney stacks. The female is brown in colour.