The housing stock
What we are usually working with in St James's
A cast iron soil stack runs down the outside of the rear wall, so moving the sink means a fresh penetration through solid brick. Pieces are cut, mitred, machined and dry-assembled on the bench before anything is loaded onto a van. Yield is worked out against the run lengths the house allows.
Buildings are listed with managed access, and deliveries generally go through a rear service entrance with a signed-in trolley route. Security zones around Whitehall and the royal parks bring road closures and vehicle checks, and ceremonial events shut the area at short notice.
A basement is often reached by its own door under the front steps, and that door is smaller than anything else on the route. A scribed end into an alcove is cut long on the bench and eased back on site, since the alcove is never the same width top and bottom. A scribe of twenty millimetres is machined, not fettled on site.
The building types here are Georgian townhouse, club and chambers building and period apartment above commercial. The one you have sets the piece length before the kitchen does.
There is nothing to visit in St James's. Samples are posted free, the template is taken in your kitchen and the stone is fitted there too.