Petworth House

S4 E1: Alan Titchmarsh returns to visit a Petworth 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 benefited from the Earl's investment.