I've repaired a puncture from a screw in my tyre with one of those plug kits. Took me about two hours on my own driveway and was such hard work that when it happened a second time about 6 months later (can you believe it!?) I simply ran down to a place that repairs them locally and let £20 go. This kind of repair would have been impossible on the side of a road somewhere because I needed pliers to get the screw out in the first place (and that was one hell of a job). Pliers now in boot. However, the idea of doing this in the dark/rain with three kids in the car on a busy road is def not something I think I'll ever actually try. Green Flag can do that thanks or at least tow me somewhere that can.