HMRC has updated the valuation table: Road Fuel Scale Charges (RFSC) from 1 May 2021 to 30 April 2022 here.
RFSC
If a business reclaims VAT incurred on road fuel, it will be required recognise the private use element of the fuel.
The RFSC simplifies accounting for VAT on the private use of fuel by motorists. The RFSC is calculated according to a car’s CO2 emissions and the fixed charge is added to output VAT, on the VAT return (in effect, the business supplies to fuel to the individual). The use of this charge is optional, the alternative is to keep detailed mileage records.
A quick RFSC calculator/ready-reckoner is here.