At the car
Found it flat in Barnet? Leave it where it is.
A Barnet flat is often noticed from the pavement: the car has been overnight on a resident street off Ballards Lane and one corner is down on the rim by breakfast. A nail from the Colindale estates, a valve that has given up, a sidewall nicked on a Totteridge kerb, all look the same from the pavement. The temptation is to limp to a garage along the A1000; a few hundred metres on a flat shreds the inner liner and a repairable tyre becomes scrap.
Ring with the street, say if it is a permit bay or a drive, and read the size from the sidewall if it is visible. The van carries repair equipment and common sizes, so whichever way the inspection goes the job is finished at the car. The fitter lifts the car where it stands in N3 or NW4, takes the tyre off, and either patches it from inside or fits a replacement, explaining the reason and confirming the price before touching a wheel nut.
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 Barnet as well.
If the job turns out to be different, see broken tyre replacement in Barnet, 24 hour tyre repair or emergency mobile tyre fitting.