6.5 Maths: Quadric Surfaces. 6.30 Introducing Electronics. 6.55 Brazil: Manufacturing the Miracie. 7.20 Social
Sciences Foundation Course. 7.45 Electricity Tariffs.

What sort of difficulties does a disabled person encounter in negotiating ' the environment?
Producer ANN POINTON
A BBC/Open University production

A concert recorded at the Regal
Theatre, Hitchin, and featured in the recent Sight and Sound In Concert series. UB 40
Director tom CORCORAN
Producer MICHAEL APPLETON

with Nicky Croydon , Bob Goody Lent Harper , Billy Hartman and Trevor Laird
The pages of the last issue of Dear Heart pulsate with pictures of sun-drenched beaches, detective stories and health advice.
Script associates
JOHN LANGDON , NICK WILTON
Choreographer SALLY GILPIN
Musical director MICHAEL OMER Designer BRUCE MACADIE
Production JUDY WHITFIELD

with subtitles, followed by Weather

A series of programmes exploring the hobby of fish-keeping. Bring in the Marines
The secret of keeping interesting fish and invertebrates from around our own shores is maintaining the quality of salt water in the aquarium.
Narrator DEREK JONES
Producer BRENDA HORSFIELD

Sir Georg Solti
In tonight's programme SOLTI exchanges the conductor's podium for the keyboard, talks about how he approaches the Mozart Piano Quartet (K 478) and perfects some of its many intricate details.
Executive producer KENNETH CORDEN Producer PETER BARTLETT

Presented by Henry Kelly and Susan Grossman , with drinks correspondent Jill Goolden
Salmon has initially been thought of as a luxury item, but tonight the Food and Drink team visit the wealthy pop star who has used his earnings to start a successful salmon farm on the west coast of Scotland.
Director ROBERT TONER
Producer PETER BAZALGETTE

Starring Ade Edmondson, Rik Mayall, Nigel Planer, Christopher Ryan
featuring Alexei Sayle as the Balowski Family
with Rip, Rig and Panic
and Keith Allen, Tony Allen, Mark Arden, Nicholas Ball, Paul Bradley, Ruth Burnett, Mark Dewison, Chris Ellis, Dawn French, Stephen Frost, Sadie Hamilton, Peter Laxton, Dave Lloyd, William MacBain, Kilian McKenna, Michael Redfern, Jennifer Saunders, Cindy Shelley, David Squire

The boys decide to throw a party, but before long it descends into chaos. A preachy Christian turns up, Rick gets annoyed when their guests arrive early. Show more

Impressions of Coronation Day
Where were you on 2 June 1953? Perhaps you were one of the 20 million who watched the day's events on television; perhaps you were one of the hundreds of thousands who braved the cold and rain to cheer the Queen through the streets of London. Possibly you were one of the 7,000 present in Westminster Abbey for the Service, the most glittering ceremony that our tradition provides. This programme tells the story of Coronation Day and the preparations for it through the reminiscences of people who were there, including Lord Ramsey - then Bishop of Durham, Lord Eccles - then Minister of Works, Lady Rayne - one of the Queen's Maids of Honour, together with the many citizens who, for one reason or another, have good cause to remember the day, like the crewmen of the Lowestoft lifeboat who were among the few that missed the Coronation celebrations.
Narrated by VERNON JOYNER
Research HELEN HOLMES Film editor RON RADDON
Written and produced by MARTIN L. BELL

JOHN TUSA , PETER SNOW and DONALD MACCORMICK present full coverage of the day's campaign developments. VINCENT HANNA analyses the latest swings in voters' intentions. LINDA ALEXANDER and JOAN BAKEWELL assess the rest of the day's news in Britain and around the world.

11.35 Ecology: Tawny Owls
How tawny owls and their prey constitute an ecological system with checks and balances that maintain stability. This case study was filmed in an Oxford wood.
12.0 Social Psychology: You Don't Fool Me
This social psychological experiment tests to see it non-verbal behaviour - hands, feet and face - gives clues to deception.