In Camberwell (SE5) the split is 83% flats to 17% houses over 12,806 households, and the stock is Georgian and early Victorian.
Because 24% of Camberwell is privately rented and 44% socially rented, a lot of SE5 work is agreed with a landlord or managing agent rather than the person opening the door.
Walls are often with surface conduit, over precast concrete panels and dense blockwork, measured on the walk in from Denmark Hill (Overground, Thameslink) rather than assumed from a map, so the fixing that matters in Camberwell is chosen on site — the usual failure here is drilling blind into a panel with reinforcement or a buried cable behind it, as the Camberwell stock goes, which is what a 83% flat share across the ONS neighbourhood covering Camberwell actually produces.
Camberwell sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate. What shapes the job more is the neighbourhood itself — georgian Camberwell Grove, the art college and King's College Hospital — which is why a SE5 quote is not a Southwark average.
On access, hospital-area restrictions, narrow Georgian streets and steep front steps — one reason one technician and a van-mounted hot-water pressure washer for most driveways; two on larger block-paving jobs where re-sanding is included, since brushing sand in is a second task run alongside the wash. Fitters travelling in use Denmark Hill (Overground, Thameslink).