Well, I'm back and it went pretty well, thanks for the advice, even if I did miss some of it due to GPRS conking out on the ferry.
Didn't really have any problems, though I suspect my B2 may not have been legal. Needed it to get a decent KM/h display though.
Only problems I had.
1) They like to put up brown signs saying services next exit, and the next exit takes you to an unlit road with no signs of life for miles and no obvious way back onto the motorway
2) They rip you off on the toll roads if you didn't get Euros. The fee was €1.90, I gave them a £10 and got €8.10 in change meaning the effective toll was more like a fiver!
Despite these problems, I dont think I'll by flying to Ireland again, it's far more civilised on the ferry and I'm allowed to take my knife and toolkit with me. I did get "searched" on the way back (by which I mean they checked my bonnet and empty boot and ignored the bags of stuff on the back seat) but that was mainly because I was early and the guard wanted to know what my car was
