No-one wants to be an expert on this from personal experience. So my contribution, based on price, cover and one call-out to the wife's Megane when the electric power-steering warning came on, is that Green Flag are worth looking at.

Call out and relay home did take a fair while but otherwise professional enough and does cover any car you (and the missus) are driving.

Next day the p/s warning light was off and been fine since. Bloody French cars!