Review: A decent grocery store but this particular Whole Foods didn't offer any vegan pastries or muffins. They had a vegan rice ball that looked like something I would put out in the yard for the birds but that was the only vegan choice. In the US all Whole Foods offer many vegan options.
I haven't been to the one in Soho but I've seen it from the outside and it looks very small - it's not a good reflection of Whole Foods Markets in the UK. The one you want to check out is Whole Foods Market on Kensington High Street - it's AMAZING. They have heaps of vegan bakery products upstairs, cakes and cupcakes etc, plus fresh sandwiches - not to mention all of the vegan grocery downstairs. And above the market itself they have a food court, including Saf (a vegean raw foods restuarant). Hope this helps.