Loading the question bank
Revision question · Vehicle weights and dimensions
Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

The headroom under bridges in the UK is at least 5 metres (16 feet 6 inches) unless marked otherwise. However, this might refer only to the highest point of an arch.
If your vehicle hits a bridge, you must report the incident to the police. If a railway bridge is involved, you must also report it to the railway authority.
Reviewed reading for this question