This time it was the turn of my Mum to break down, right on the approach to traffic lights. 🙁 I towed her Volkswagen Polo back to her drive and parked it under the car port. I had a quick look to see if I could work out what’s wrong. There’s no ignition spark, there’s ignition supply to the coil and distributor and the coil windings are displaying the correct values of resistance but the distributor is full of lots of little ceramic fragments so it looks like the hall effect sensor has disintegrated.