I mentioned this thread to a friend of mine and she's given me some info to pass onto you.
Homeworkers' Helpline 0800 174095
National Group on Homeworking
Office 26
30 - 38 Dock Street
Leeds LS10 1JF
0113 245 4273
According to Helen, they both provide information on what sorts of businesses you can start and how to get the best help available.
So, good luck with your venture and I hope this posting has helped.