Alan Titchmarsh reveals the history, human stories and the hidden treasures of Britain's historical estates. Set on the shores of the beautiful Strangford Lough in Northern Ireland is one of the most glorious houses in the National Trust Collection, Mount Stewart.

Alan Titchmarsh reveals the history, human stories and the hidden treasures of Britain's historical estates. Encircled by a protective wall and with an ancient herd of fallow deer roaming the grounds, sits the glorious Georgian mansion Dunham Massey.

The presenter returns to visit a house in West Sussex known as `the house of art". Sat in beautiful Capability Brown-designed grounds, Petworth House was home to the third Earl of Egremont, whose passion for British art saw the abode become an art school for the nation's talents. Plus, Jennie Bond discovers a Grand Tour with a difference, and Peter Purves navigates the Chichester Canal to reveal it wasn't just the art world which benefitted from the Earl's investment.