The Victorian tower of Insole Court, Cardiff is being opened for National Lottery Open Week.
This is a rare opportunity for National Lottery players to explore a hidden gem rarely accessible to the public.
The mansion has been used as a filming location for multiple BBC One productions — including Doctor Who, The Trick, Decline & Fall and Death Valley — as well as Sky One's
A Discovery of Witches and currently in BBC One/HBO's Industry
Wartime sketches of Hitler, Churchill, Stalin and Uncle Sam drawn by a wartime policeman onto the foyer fireback are preserved and still visible today
Tower Tours run exclusively during National Lottery Open Week, 13–15 March
Welsh actress Joanna Page issues a rallying cry for people across Wales to get out and
discover their local hidden gems during National Lottery Open Week 2026 (7–15 March)
