Walked back to the car at Potters Bar station off J24 and found the tyre flat? Leave it there, keep it off the M25, and we come out to decide what it needs.
Flat tyres around the orbital turn up in two ways. Some sink overnight in a commuter car park at Chorleywood or Egham after a slow leak; others sag while parked at services after a nail was collected earlier in the journey. The temptation is to pump it up on the forecourt and carry on. On a road where the next junction can be several miles off, a tyre that went flat once usually goes again, far from anywhere sensible to stop.
Leave the car exactly where it sits and ring through the location, the sidewall size and mention any locking wheel nut. On arrival the wheel is removed, the tyre is eased off the rim for an inside check, and the decision is made beside the car: a repair to BS AU 159 if the hole allows, or a replacement from the van if it does not. Both possibilities and their prices are explained on the call beforehand.
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 near the M25 as well.
The same Brent Cross team also handles broken tyre replacement on the M25 and emergency mobile tyre fitting on the M25, booked on the same call.
A flat found in an Egham car park off J13, a side street in Chorleywood or at any of the four M25 services is fine to deal with. A tyre that went flat while moving on the carriageway is a recovery job first.
| Road | M25 London Orbital |
|---|---|
| Operator | National Highways |
Steering pulling to one side after J28? Carry on to the exit only when the car still feels controllable; otherwise follow National Highways advice and dial 999 if you are in danger. On Colchester Road or the Southend Arterial Road, indicate in good time and turn into a residential street or the Rom Valley Retail Park bays. Hazard lights, passengers onto the verge of the pavement, then ring.
A flat discovered at Clacket Lane can hide a second soft tyre, so walk round all four wheels first. On the empty one, look for a nail head poking from the rubber, a valve stem that is cracked or leaning, and any fresh kerb scrape. Driving it even to a garage in Godstone off J6 grinds the sidewall to pieces. A space-saver, if your car carries one, is for low speeds and short distances, a way to reach a Godstone car park rather than to get home.
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Flat tyre by the M25? Leave the car parked and send us the location.
