if the portion reimbursed is below the HMRC Recognised amount, you can make a personal claim for the remaining amount on your taxes. The personal claim is called the Mileage Allowance Relief (MAR).
Between the government screwing me out of my winter fuel allowance and the tax man illegally withholding money that is rightfully mine, I, as a pensioner, am being deprived of living my life to the full, my only income is £221.20 a week. I hope they choke on their christmas dinner, ...