Overtake this Ford Fiesta because it's doing 30 in a 40 & one of those constantly braking & weaving drivers.
Soon as I'm past them they're right up my back end, can't even see their number plate until we get to a point where I'm taking a right turn & they're taking a left.
If you don't want anyone overtaking then just do the limit.
You are both in the wrong. There is no law against passing on the left if it can be done safely.