On today’s Bargain Hunt, Eric Knowles visits Castell Coch, a fairytale castle near Cardiff, where one man’s dream and another man’s vivid imagination run wild to create a gothic fantasy folly. The reds and blues are in the National Botanic Gardens of Wales trying to unearth some bargains with new expert Ochuko Ojiri and regular Jonathan Pratt – but which team will make the biggest profit at auction?