I've seen 'race skin' kit this week, only the tri suit. (New club kit)It looks ok. I've not see anything else. Personally, I wear separates and always worn orca bottoms and would suspect a tri top to be fine for long distance.
impsport supply Lincs tri, there kit again looks ok, I can get back to you on if it is. (I'll ask some off the guys that wear it)
Unfortunately as I'm about to be made bionic this year (imminent fusion on 2 vertebrae) it looks like my iron distance days are over. On the plus side Bolton is so close, it would be rude not to go over and support!!