He added that, from what had been discovered so far, it appears as though the inhabitants’ life would have been tough.If you’re working in the fields you are living hand to mouth every single day – it’s a really hard existence.  Stuart said the population swelled to tens of thousands within just 25 years.

The buildings appear seem to date back to 1300 A.D. when the town was reorganised and built in stone after the attacks by both English and Welsh forces in the previous decade.

Mr Wilson said evidence of the earlier town has been found below some of the buildings, with occupation on the site believed to have started 100 years previously.By 1400 some of the buildings had fallen into ruin and by 1650 after the civil war the last of the buildings were abandoned.    So far, Stuart and his volunteers have discovered the remains of a manor house with two halls and a courtyard, enclosed with curtain walls and a massive Round Tower.

In the last 15 years, Stuart has been joined by hundreds of volunteers – both from the local area and, in the summer, from universities and colleges – as they unearthed what he now believes is the hidden city.