i agree the website is a bit busy, and there's not a lot of merino on it, I however found loads in the Wimbledon branch. I've bought a fair amount of stuff from these guys before (albeit not merino) and although cheap they are very good quality clothes (i.e. not like Primark) I'll let you know how it washes tho
"Cheap" merino is a waste of money. It'll itch, shrink and be a load of tat. Know - tried it. Ended up chucking it away after one wash. Real, good, wear-next-to-skin merino isn't a cheap fabric simply cos there's not a lot of it about. What theres plenty of is not-so-good merino that's badly made (invariably in China). Either save up and buy something decent or forget it.