Secrets of the National Trust with Alan Titchmarsh Season 4: Episode Guide & Ratings

Set in beautifully designed grounds and owned by the art-loving third Earl of Egremont, Petworth was the inspiration for many famous painters.

Alan Titchmarsh and the team go behind the scenes at Sir Winston Churchill's former country house, Chartwell, in the Weald of Kent.

An elegant mansion on the banks of the Menai Strait, Plas Newydd has been home to the Marquesses of Anglesey since Waterloo, and boasts a history packed with action and adventure.