Archaeologist defies sceptics in pursuit of lost city of Trellech

After facing years of doubts, Stuart Wilson's claim that he has found medieval city on English-Welsh border is being listened to

The first clue was provided by moles. As the creatures burrowed beneath a farmer's field close to the border between England and Wales, they threw up fragments of what appeared to be medieval pottery.

Stuart Wilson, an archaeology graduate who was working in a toll bridge booth, took a gamble and bought the field for 32,000 when he could have been investing in his first house.