Good luck with this, very exciting times I imagine.
It seems a few UK stores supply particular products that can all be found in the Northern Brewer website.
Perhaps they've developed a working relationship with these guys and have worked out a supplier/distributing deal with them. Anyways, NB is a great indication of whats available on the market and is a great resource for both brewers and winemakers.
On a personnal level, I'd like to see more Lalvin wine yeats available.
You wouldn't have recently found yourself with a mountain of used Coca Cola Cornelius kegs recently, would you?!