In reply to Jackwd:
Some possibles discussed here:
http://www.ukclimbing.com/forums/t.php?n=609257
http://www.ukclimbing.com/forums/t.php?n=610892
http://www.ukclimbing.com/forums/t.php?n=606789
The R1 hoody clones are too thick to count as base layers, IMHO.
I opted to buy the MEC T3 hoody, which is much more a true base layer. The sale price is cheap, but carriage, VAT and 'handling charge' make single item purchase from Canada uneconomic. Shame, because it's fabulous...
[edit] not seen one in the flesh, but the All Weather looks like it's a closely-knit fabric. The base/mid use recommendation supports that.
Post edited at 18:24