Live Snooker: The World Championships, BBC2, 10am
IT’S already been a thrilling season of snooker and it’s about to reach its climax at the Crucible Theatre in Sheffield over the next fortnight. This morning, Hazel Irvine presents coverage of the opening session, as three-time champion Mark Selby begins the defence of the title he secured by beating four-time winner John Higgins in last year’s final. However, the Englishman’s form has deserted him and he has only added one further victory.

Britain’s Most Historic Towns, C4, 8pm
ALICE Roberts explores the Norman period of British history by examining events that occurred in Winchester, a historic town that still retains many hallmarks of the 11th and 12th centuries. To get a taste of this era, she attempts to storm a castle while wearing chain mail, investigates the origins of modern surgery and tries some eel pie.

At the end of the episode, computer-generated imagery is used to take the town back in time and recreate how it would have looked during this period.

Imagine – Habaneros: You Say You Want a Revolution? BBC2, 9pm
PART one of a two-part documentary exploring the lives of Havana residents in the wake of Raul Castro stepping down as president of Cuba.

The film looks back on the history of their city, from being established as a Spanish colony to Fidel Castro’s revolution, and examines what the future may hold in the face of a US trade blockade. It also features previously unseen archive footage from the capture of the city by Castro’s guerrillas in 1959, as well as interviews with Havana’s residents.