6.40 Maths - Multiplying Matrices

7.5 Art and Environment

7.30 Disaster and Simulation - 1: The Event

The Ladbrokes Grand National Meeting
2.35 Topham Trophy Handicap 'Chase (2m 6f)
Over one complete circuit of all the Grand National fences.
3.10 Holiday Inn H'cap'Chase (2½m)
3.45 Hardman Lasky 's Handicap Hurdle (2m)
4.20 Haig Whisky Hunters 'Chase (2m 6f)
Commentators
PETER O'SULLEVAN , JULIAN WILSON RICHARD PITMAN , JOHN HANMER Introduced by TONY GUBBA
Television presentation by FRED VINER , RICHARD TILLING ,NICK HUNTER
Racing tips and results on Ceefax

4.50 Medieval Mystery Plays

5.40 The £5,000-million Industry

6.5 Water for Oxford

6.30 Hockett's Design Features

The Hastings
Every year around 100 amateur race walkers from all over Britain come to Sussex for the notorious 38-mile Hastings to Brighton road walk. Race walking is a very punishing sport, demanding a high degree of fitness and extreme dedication. This film follows the fortunes of some of the walkers.
Director RUGH DUGGAN
Producer JOHN COLEMAN

with sub-titles for the hard-of-hearing, followed by Weather

Behind Protective Walls?
As soaring imports continue to undermine efforts to revive vulnerable British industries, are calls to 'buy British' enough? Should we instead take firmer action to control the flood of imports. to rebuild our industries behind a wall of protective taxes and quotas? Would foreign retaliation then do more harm than good?
Donald MacCormick reports.
Producer PETA DESCHAMFSNEUFS Editor PETER IBBOTSON

A series of ten new films about arts and crafts in Britain today. 2: Stephen Gottlieb
'One of the things that really makes me do it is the beauty of the instrument itself-almost apart from the sound of it.'
STEPHEN GOTTLIEB is a lute maker who trained as an architect. In his Clerkenwell workshop he puts together materials such as ebony, larch, sycamore and yew, and with gut, glue and nails produces an instrument that has changed little since the 16th century.
Film editor BEN MORRIS
Series producer JOHN READ Producer DOROTHY SPOKES

'Clubland was turning to gang-land. People were frightened. The police were nervous. Was the Mafia moving in?'-Tyneside 1966
The first of two documentary films which investigate the murder of ANGUS SIBBET, a gaming-machine collector who was shot dead in the Durham mining village of South
Hetton in the New Year of 1967. Two men were convicted:
Dennis Stafford and Michael Luvaglio , both leading figures in the clubland scene of Tyneside in the mid-60s. They have been released from prison recently and have been talking to reporter Stuart Prebble as part of this new inquiry into one of the great unresolved mysteries of 20th-century crime.
Producer DAVID SEYMOUR
(Part 2 tomorrow at 8.0 pm;

Being a reconstruction in eight parts of the strange case surrounding Constance Kent written by DOUGLAS LIVINGSTONE
2: Mary Pratt , formerly employed as governess, now rules the household as the second Mrs Kent Savill. , her first child, is born ... and as her family increases so relations deteriorate between her and her two youngest step-children William and Constance.
(For full cast list see Tuesday, page 55) (Part 3 next Tuesday evening)

Investigates, Discovers, Questions This week: Film Biz
Why are there so few truly British films these days? Why is it that the French, the Swedes, the Germans and the Australians all have thriving indigenous film industries while British film-makers are reduced to turning out movies for the moguls of Hollywood?
In the 1960s, British films were box-office hits around the world, and American investment flooded the studios. Then the economic tide flowed in the other direction and for most of the 70s the British film industry was high and dry. Now it's picking itself up again and going for the big time.
But what will the industry of the 80s produce? Gavin Scott has been talking to the producers, the money men and the studio chiefs who decide what happens when the cameras start to turn.
Producer ROBYN WALLIS Editor TIM SLESSOR

Featuring three most diverse acts Telephone Bill and the Smooth Operators - the Cambridge-based band, bizarre and unpredictable, playing a curious mixture of British bluegrass and acoustic rock.
Dave Cousins - joyfully rediscovering his folk roots after many years with the rock band STRAWBS.
Maddy Prior -taking the biggest risk of all, choosing a radical new contemporary direction after eight years as the darling of folk-rock band STEELEYE SPAN.
Recorded at Cherry Hinton Hall , Cambridge. Festival organiser KEN WOOLLARD Lighting JOHN STERLING. Sound ALAN FOX Producer DON SAYER

including at 11.15* news summary and weather forecast

The Rt Hon
Denis Healey , mp for the Opposition

Five lectures from the Royal Institution on a theme for the 80s.
2: Sir Richard O'Brien , Chairman, Manpower Services Commission
' We ought to be thinking more how we can help the unemployed to contribute to society, instead of being a charge on it.'
Director FRANK ASH
Producer ROGER OWEN

GABRIEL WOOLF reads
Planting Flowers on the Eastern Embankment by PO-CHULI translated by ARTHUR WALEY