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'Hidden' Roman fort relies on moles to unearth treasure

22 May 2012 Last updated at 15:24 BST

A buried and little known Roman fort near Alston, Cumbria is to be turned into a visitor attraction.

Whitley Castle, or Epiacum, at Castle Nook Farm has not been explored by archaeologists apart from one small dig in 1957.

Because it is a scheduled ancient monument no-one is allowed to dig there.

But that does not mean tantalising clues are not being unearthed, as Gerry Jackson reports.