Dealing with a flat tyre and no locking wheel nut key can definitely be tricky, but it’s not impossible to sort out at the roadside. Here are a few options you can explore:

1. Roadside Assistance Services

If you have roadside assistance (e.g., through your insurance, a breakdown service like the AA, RAC, or Green Flag), they can often remove a locking wheel nut without the key. They have specialized tools like:

• Locking wheel nut removers: These are designed to grip onto the nut and remove it, even if the key is missing or damaged.
• Hammer and socket method: A technician may use a tool that fits over the locking nut and remove it through a high-torque process.

2. Mobile Tyre Fitting Services

Some mobile tyre fitters may be able to remove the locking wheel nut for you, even if you don’t have the key. If you’re calling a mobile service to come out, it’s worth mentioning the missing key when booking, so they can come prepared with the right tools.

3. Garage or Mechanic

If you’re near a garage or mechanic, they might be able to assist in removing the locking nut, even without the key. They typically have removal tools that could help in this scenario.

4. Locking Wheel Nut Removal Kit

If you’re not near a service that can come to you, you can sometimes buy or rent a locking wheel nut removal kit. These kits usually come with a special socket that can grip and remove the locking nut. You might need to call a local garage to assist with this if you’re not sure how to do it yourself.

If you’re stuck and don’t want to wait too long, calling a roadside assistance or mobile tyre service is probably your best bet.