Woodchester Mansion near Stroud in Gloucestershire was abandoned, unfinished, in the late 19th century. It is now Grade 1 listed.

Woodchester was very badly damaged by frost. Trainee stonemasons are taking painstaking steps towards rectifying that.

The Princes of Wales's Building Crafts Apprentices spent time at the mansion to learn hands-on.

Young stonemasons are working on a masons' lodge crafted from stone reclaimed from the mansion itself and using traditional methods.

Rob Hanks, 22, says he finds the very precise requirements of heritage building a challenge. "Sometimes it feels like a very backward way of thinking," he admits.

But others like Niki Kerridge, 22, love the old ways. "It's quite methodical. There's lots of geometry and technique involved. I love it."

Stephen Davis, chair of Woodchester Mansion Trust, is passionate about training a new generation of craftsmen and women