Millions of speeding prosecutions could be overturned after the National Highway admits a major technical glitch.

Think you know how speed cameras work? Think again. Relying on the '10% buffer' and other 'rules' might not save you from a fine - or worse.

Hundreds of drivers could be caught out by new AI cameras with devices set to be "used sporadically" after a successful trial.

Motorists could be caught out by new speeding rules, with thousands already issued tickets since the changes.