BBC Four HD Schedule, Today (United Kingdom)

Sir John Betjeman, poet laureate, visits and explains the architecture of various churches in the Diocese of Norwich. [S]

2/3. Presenter Lydia Wilson and calligrapher Brody Neuenschwander set out to explore history's most important technology - the technology of putting words on a page. [S] [HD]

Rick Stein celebrates John Betjeman's long love affair with the English seaside holiday and his affection for Cornwall. The programme culminates in a seafood feast cooked by Rick. [S,AD]

Intimate portrait of Sir John Betjeman, one of the most popular English poets of the 20th century. Featuring contributions from the Prince of Wales and Lord Snowdon. [S,AD]

Programmes start at 7.00pm. [HD]

Programmes start at 7.00pm. [HD]

As the spring sunshine melts the snow and ice on a lake which is a stop-off point for 10,000 migrating cranes, the birds start to do an unforgettable dance. [S]

4/15. Michael heads across the Kent coast, visiting Walmer Castle and the resort of Margate. [S,AD] [HD]

4/4. Beginning at Bolton Priory, Shanaz Gulzar meanders along the banks of the treacle-coloured River Wharfe before climbing up through the Valley of Desolation. [S] [HD]

3/3. Alan Bennett watches the main daily service of Evensong and reflects on his boyhood religion. [S]

A journey into the eye-opening realm of insects to explore how scientists are using traditional and cutting-edge techniques to search for a single, common insect ancestor. [S] [HD]

10/13. Kenneth Clark looks at the beginnings of revolutionary politics in the 18th century. [S]

11/13. Kenneth Clark examines the belief in the divinity of nature. [S]

Crime writer Ian Rankin revisits the key locations from the Inspector Rebus books, the hidden Edinburgh into which tourists never venture. Deals with adult themes. [S,AD]