I caught the 1000 this morning - thanks for all the replies (though I'm afraid I didn't see yours in time, TheBigD). It was a two-car unit, with the bike spaces in coach C next to the disabled toilet as you all said. I don't understand what XC expect you to do with your bike though: one train had a piece of metal sticking out on the same side as the disabled toilet, with a bike symbol above, looking like you were expected to put your bike frame around that (taking out 3 seats in the process) - but my bike didn't fit between the seats! I ended up just putting it against the side opposite the disabled toilet. On the way back, the bike symbol was on the opposite side to the train out so both myself and the other cyclist just stuck our bikes there. I must admit I expected slightly more!