Cheers for putting the tarp pics up flatfish.
If anyone's interested it's a 3m x 3m set up with a single pole. The idea being that you're covered on 3 sides, with a 'built in' ground sheet and a decent sized 'porch' for cooking and you can sit up. You can't really tell from the pic but the are forward of the pole under the beak is quite a size, so enough room to store gear too. The front guy can be dropped to lower the beak for really bad weather too, so you're almost enclosed.
The key is finding a way of attaching a pole to the tarp. The pole needs to sit inboard of the tarp, not at it's edge, otherwise you don't get the beak and steep sided back. I ended up making a 3" pole sleeve from nylon webbing (not much fun to sew) which is attached to the tarp using 'tarp clips'. The pole weighs 110g and folds to 30cm so it's easy enough to find it a home on the bike.
Right I'll take my anorak off now then