Although not mentioned in the Chancellor’s speech, this is lurking away in the Budget documentation:
”Vehicle Excise Duty (VED): Uprating – From 1 April 2019 VED rates for cars, vans and motorcycles will increase in line with RPI. To support the haulage sector, the government will freeze the Heavy Goods Vehicle (HGV) VED for 2019-20. (62)”
In para 4.11 Transport tax in the following Gov.uk link:
https://www.gov.uk/government/publications/budget-2018-documents/budget-2018#tax