bee keeper/pest control recommendations wanted

[newto Dulwich]

Some honey bees have moved in and I'm keen to get rid of them. They are going in to the roof space between tiles. Unfortunately as we have a loft conversion so it isn't possible to get access via the loft space. Has anyone had experience of this type of issue/have recommendations?

[Roundabout]

Try http://www.eastdulwichforum.co.uk/forum/read.php?30,1368186