Mystery medieval tunnels that don't appear on maps are uncovered near 12th century abbey

The tunnel site was found near to Tintern Abbey close to the England-Wales border in Tintern, Monmouthshire by engineers working for Western Power Distribution. https://www.dailymail.co.uk/news/article-9330203/Mystery-medieval-tunnels-dont-appear-maps-uncovered-near-12th-century-abbey.html?ns_mchannel=rss&ns_campaign=1490&ito=1490