There’s alarm over a new chemical additive for food.

Reporter David Lander investigates the worrying impact of N7Q.

Presented by David Lander with assistance from Stephen Fry.

Studio production by:

Mark Arden
Julia Hills
Harry Hill

Dramatic reconstructions by:

Jack Klaff
Robert Bathurst
Felicity Montagu

Researched by Tony Sarchet.

Editor: Paul Mayhew-Archer

Delve Special ran for four series from 1984 to 1987 and later transferred to TV as: This is David Lander.

First broadcast on BBC Radio 4 in September 1986. Show less