BBC Four HD Tuesday

Michael Portillo explores the Britain of his youth, starting at Preston's Fulwood Barracks and heading to Bury Bolton Street Station in Greater Manchester

Julia Bradbury sets off in the footsteps of Alfred Wainwright, heading for the summit of Helvellyn via Striding Edge - which she reaches just as cloud and rain descend

The story of John Logie Baird, the man who invented TV, featuring rare archive footage

The country's diverse wildlife, beginning with a look at the relationship between humans and animals in southern China, including how water buffalo are used in agriculture