Thanks for all your input guys...that £20 one is tempting...but I'm not sure the flexi shaft they mention is what I'm thinking of...i'd be surprised at that price. It's hard to tell because there's not extra pics. Doh.
I've got my eye on a nice dremel pro with flexishaft on ebay, still a tad spensive though. Might try to do some research on the challenge one.
The flexi shaft is a almost meter long, you connect one end to the dremel and put the tool you want to use in the other You can also put it on the stand so the dremel is raised in the air making it easier to use