I popped in today and got
this long-sleeved merino base layer for £16.99. I've never tried merino before, but its stretch makes it cling close to the skin with no bagginess and without feeling too tight - it seems pretty nice.
I also got a pair of
these arm warmers for £5.99, acrylic/wool/polyester "with merino", and they seem decent too, though I don't know what the little knobbly beady bits stuck to the top end are for
(updated - found them on the site).
And, as usual, a couple of 400ml cans of GT85 for £2 each.
Oh, and
these winter jackets looked pretty reasonable too, but they only had sizes too small for me.