ive only just found out about this tax relief for business mileage as well, form P87 is my new friend!! It can be worth quite a bit of money if you cover up to 10,000 business miles per year and they let you claim back five years in arrears.I’m PAYE. But I have to submit a tax return due to the changes in child benefits. I also claim a rebate on work motor expenses where I use a private car.
I got £495 back this year. It’s worth a couple of hours of my weekend.