The people that run the Cardiff shop are Paul and Katie, Katie delt with my order so maybe its best to deal with her as she'll know what your on about!
It's a small family-run shop in Cardiff, really nice people.
I sent them a cheque for £12.99 and a self-addressed, stamped envelope [a quid's worth of stamps] and a week or so later it had turned up.
Quality of t-shirt and print is great. They'll do any colour and any design as long as you email them the pics.