PB, I think we're missing a trick:
Of course being so conveniently close to the Lake District my Maule doesn't need to use a car wash, but since it lives in a tractor shed:
1. Register with DVLC as "agricultural engine"
2. Add to existing tractor insurance policy
3. Collect free tax disc from post office
4. Take Mrs J shopping, pulling full flap so as to observe speed limit on Princes Street...