How the job is done
Found it flat in Greenwich? Leave it where it is.
Nobody feels a Greenwich flat happen; they find it. You return to a car near Westcombe Park and it is sitting low. You walk back to the streets around Millennium Way after a night at the O2 and the rear tyre is down. Rolling it to a tyre place on the A20 seems reasonable and is not: each turn of a flat tyre crushes sidewall against rim, and a repairable nail ends as a tyre needing replacement.
Leave it exactly where it is. Send the street, the SE postcode and a photo, and the fitter comes out, takes the tyre off the rim and works out what happened. A nail through the tread crown gets patched then and there to BS AU 159. A weeping valve or a corroded rim seal is fixed. A sidewall crushed by being driven flat calls for a fresh tyre from the van. You are told the cost of each outcome before the fitter sets off.
On run-flat tyres? They behave differently once deflated, so check the handbook's limits and read our page on run-flat tyres; we fit replacement run-flat tyres at the car in Greenwich as well.
Other jobs we do at the car include broken tyre replacement in Greenwich and van tyre fitting in Greenwich.