6.40 Simulation Modelling

7.5 Handicapped in the Community

7.30 Multiplexing

(UHF only)

9.15 Engineering Craft Studies
Process of Engineering Production
9.38 History 1917-73. The Cold War .
10.0 TV Club. Good Fortune
10.23 Hyn o Fyd. Stori a Chwedl Dinas dan y Mor - Cantre'r Gwaelod
Cyflwynydd MEIRION EDWARDS Cynhyrchydd ROBIN ROLLINSON

(Repeat)

11.0 Exploring Science
Planning the Environment
11.23 Words and Pictures
Trog and the Dog
11.40 Biology
Natural Selection

Weather BARBARA EDWARDS

including The Musicmakers

Beaks and Claius
Mac and Leah, the macaws, Juno the parrot, flamingoes, avocets, humming birds, penguins - all at home In an unusual garden. Music and narration by DEREK GRIFFITHS

2.1 Watch. Easter Eggs
2.18 Europe from the Air
New Lights: two new centres of population - the new Polder in the Netherlands, and Pisticci in south Italy.
Narrated by DENIS TUOHY Producer LEN BROWN
2.40 Focus. 10: What Maths Have You Been Taught?
Do schools teach the mathematical skills necessary for later life? And should they? Presented by ROGER MCGOUGH and TSTEPHEN JESSEL Director PETER LEE-WRIGHT Producer CHRIS JELLEY

The National Hunt Festival
3.40 The Champion Hurdle Challenge Cup (2m 200yds). Today's principal race, with a first prize of 119,000. 3.53 Regional News (exc London)

with Wendy Wood
Stories from Scotland
Adapted from traditional sources by MICHAEL BARTLETT
Today: The Call of the Sea

and Bailey's Comets

with Richard Baker ; Weatherman

Presenting the British scene to the people of Britain.

by the Labour Party
(Also on BBC2)

with Richard Baker ; Weather

Introduced by Harry Carpenter
Action, news, personalities and opinion from home and overseas including tonight:
The Centenary Test Australia v England
By satellite from
Melbourne, highlights of the fourth day's play in the special match being played ' down under' to celebrate 100 years of Anglo-Australian rivalry on the cricket field. c Cheltenham National Hunt Festival JULIAN WILSON looks back at this afternoon's Champion Hurdle and 2 forward to tomorrow's Gold Cup.
Plus news and results of tonight's European football.
Cricket presented in association with the AUSTRALIAN BROADCASTING COMMISSION Producer MARTIN HOPKINS Editor JONATHAN MARTIN

with Raymond Baxter and Michael Buerk
Whose Oil?
Exxon of America, who control Esso, is the biggest business in the world. Experts predict that the company will earn £2,700-million from its investment in the North Sea. One field alone is expected to yield a profit of £38-million for a consortium headed by another of the oil giants, Mobil. So whose oil is it? The British, the Americans, or God's?
Tonight's Energy File examines the risks and the rewards with two of the world's most powerful businessmen
Clifton C. Garvin Jr of Exxon and Rawleigh Warner Jr of Mobil.
Director ROGER CASSTLES
Producers ARTHUR BINNIE , DAVID MARTIN BBC Scotland

with JOHN TIMPSON , DENIS TUOHY Including News Headlines

The Mapping of Mercury
First detailed photographs of Mercury, the innermost planet, were obtained by the American space-probe Mariner 10. Maps of Mercury have been drawn from these photographs by Arthur Cross and in this programme he joins Patrick Moore to explain how the maps were made and what they have told us.
Producer PATRICIA WOOD