f you are trying to sell an idea for a programme...The main broadcasters generally won't accept unsolicited ideas for TV programmes directly from the public. But instead prefer proper proposals from established producers. Take a look at
http://www.bbc.co.uk/commissioning/
for details on how the BBC's commissiong process works.
Also, the Guardian Media Guide has lots of contact information on members of the Broadcast industry and independant producers and production companies. It can be bought here, or your library may have a copy.
http://www.countrybookshop.co.uk/books/index.phtml
?whatfor=1843540142.
If you just want to make a specific or general enquiry about a programme, you can usually contact the production team via the programmes website if it has one, or in the BBC's case you can also click the following link. For more information on gaining information on programmes.
Hope target=_blank>http://www.bbc.co.uk/feedback/
Hope
this helps.