Large Goods Vehicle (LGV) Theory Practice Test 2026 - Free LGV Theory Practice Questions and Study Guide

When moving a high load, you must notify the telephone companies when the height exceeds five and a quarter metres. This threshold exists because above that height there’s a real risk of hitting overhead telecom lines along the route, so it’s important to give the network operators advance warning. They can advise on safe routing, arrange line clearance if needed, or provide guidance for any required escorts or temporary disruptions.

The other height options are lower than the rule threshold, so they aren’t the trigger for notifying telecoms. Even if you’re below five and a quarter metres, you still need to plan carefully and watch for overhead hazards, but formal notification isn’t required.