Mystery secret tunnel unused for centuries is discovered in back garden

Experts have been called in to see if any more can be learned about the tunnel (Picture: Media Wales)It started with a mission to remove a wooden pole to lay some cabling, but ended up revealing a centuries old mystery.
A secret tunnel that could date back to the 12th century, and not marked on any maps since at least the 1700s was discovered by workmen in Tintern, Monmouthshire.
They had been called to the historic village to move overhead power lines to a different part of a customer’s p