The housing stock
What we are usually working with in Greenwich Peninsula
Painted brick is flat nowhere, and raked-back mortar joints leave a line no straightedge agrees with. A wall out by a few millimetres over a metre will show behind a full-height panel and disappear behind an upstand. Twenty millimetres of packing behind a panel is not a fix.
Everything goes through a loading bay and a goods lift on a booked slot, with floor and lift protection and a concierge who wants notice; the lift car dimension, not the front door, decides maximum slab length.
Many of these kitchens are a fitted pod dropped into open floor, so three sides are free and only the fourth is ever scribed. Where conduit or pipework crosses the wall the panel either stops at it or is cut around it, and that is settled before fabrication. The plaster behind it is the real question.
What the job sheets keep listing is 2000s Millennium Village housing, 2010s-2020s high-rise apartments and riverside warehouse conversion. That mix is why two jobs on the same road can run completely differently.
There is nothing to visit in Greenwich Peninsula. Samples are posted free, the template is taken in your kitchen and the stone is fitted there too.