What happens
Found it flat in Small Heath? Leave it where it is.
Flat by morning on Herbert Road could mean several things: a bolt from the Highway, a perished valve, a leak where the tyre meets a corroded rim, or a cut you cannot see from the pavement. What turns any of them expensive is moving the car. A few hundred yards on no air folds the sidewall under the wheel and destroys it. Parents near Small Heath Leisure Centre and shift workers heading for the airport face the same temptation; resist it.
Send the sidewall size and the street by WhatsApp, a photo if you can. On Herbert Road the tyre is pumped back up and the escaping air hunted down, and only then is a verdict given: a small hole in the central tread is patched to BS AU 159, a failed valve is changed, anything worse gets a replacement carried on board. Diagnosis and cost are both explained before the wheel comes 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 Small Heath as well.
Other services from the same Brent Cross team: broken tyre replacement in Small Heath and emergency tyre repair in Small Heath.