They stipulate the card cannot be used for fares below £12 between 04:00 and 10:00, Monday to Friday.

The rule does not apply in July and August, when Mr Williamson used his railcard on several similar journeys without falling foul of the rules.

This is pretty confusing to be fair - I wouldn't expect a rule about train tickets that applies during some months and not others. We're used to conditions about time of day and day of week, but month is a new one for me.