Langton Green which was the centre of the Subbuteo universe. They also had premises at Wadhurst, in Tunbridge Wells (bottom of Warwick Park) and in Chiddingstone Causeway. I don't know how the other sites fitted into the grand scheme of things.
At the back of Kev's house in Third Street. Google Streetview shows that the site is now two detached houses although the road itself remains unadopted.
No, but a mate of mine who lived next door to the moulding plant (a medium sized tin shed as I recall) that produced the figures got loads of "mis shape" players given to him and made his own stands from cardboard. Problem was that it made the game virtually impossible to play without knocking...
I am sure that there were when I visited last week after a stadium tour. Surely Subbueteo teams were generic, ie "blue and white stripes" would cover several teams? I used to live 5' walk from their HQ and could wander up there on a Saturday morning and buy stuff straight from source.