'04 V40; has sat in driveway for a few years now. Started regularly but eventually the battery began to run down so I would jump start it every 10 days or so and leave running for half an hour; not ideal, I know (but life got in the way) - and I couldn't bear to part with it for sentimental reasons!

Started firing on 3 cylinders approx 3 months ago.

Now it won't start at all. Starter motor turns over but not firing.

There is plenty of petrol in the tank.

I've fitted a new battery and sparks. No sign of moisture ingress anywhere.

Any ideas? Are ignition coils the likely culprit?

Thanks for your thoughts.