Wartime secret of Bodelwyddan Castle

One of Wales' grandest country houses hides a secret - it also has one of Wales' strangest war relics.

The grounds of Bodelwyddan Castle in North Wales were once used by troops in the First World War. They built a series of practice trenches to prepare thousands of men for life in the front line.

Rob Shelley went to see a unique reminder of a conflict that is nearing its centenary.