The Edinburgh -
EBC has a workshop right next to the showroom and it is one of the things they're extremely proud of. They do special offers(discounts) on custom built bikes - if you buy all the parts from them and let EBC build the bike for you.
They run various levels of bike maintenance courses - from basic oil/lube/brake adjustment, to full assembley and wheel building courses for both experienced and newbie cyclists of both sexes.
They've advertised for mechanic's for their Sheffield EBC so there's going to be a workshop of some type within the building. This will probably expand to a similar size as the Edinburgh one - once the shop is more established, I'd imagine.