Advisory Fuel Rates (AFRs) are reviewed by HMRC on a quarterly basis. The outcome of these reviews is published on GOV.UK on 1 March, 1 June, 1 September, and 1 December respectively. AFRs were increased on 1 June to reflect the latest fuel prices. AFRs represent the fuel cost per mile for different engine types and sizes, based on average pump prices in the UK. The latest petrol and diesel prices are taken from the Department for Business, Energy and Industrial Strategy (BEIS) and the LPG (UK average) is from the Automobile Association website.