TV and radio

10 July Sport Relief 2004 BBC 1, 7 to 9pm; BBC 2, 9 to 9.30pm; BBC 1, 9.30pm to midnight An evening of sport-themed programmes to raise money to help children and young people. Viewers can donate on the night via the Sport Relief donation line on 08457 910 910, the website www.bbc.co.uk/sportrelief or by pressing the red button on their interactive TV remote. 11 July The Food Programme - Tuna BBC Radio 4, 12.30 to 1pm The British love tinned tuna, served with everything from mayonnaise to sweet corn. But perhaps people should think...