I have recently been promoted with my employer. My commute is an 80 mile round trip but I have mostly worked from home with 1/2 days a month in the office. My new role basically calls for a lot of travelling / supplier visits etc. 2 / 3 times a week. I’m told I can’t claim mileage for these as most of them are under my office commute. I don’t get a company car or allowance. AIBU to think that given that I’m using my own car, require business insurance etc. that I should be able to claim for fuel? Especially given how expensive it is at the moment? It basically wipes out my increase in salary?