Is it the one where the have a competition - someone says something nice to someone else, and if you spot it and ring in, you win a prize?
No - thought not.
Seriously - it's highly unlikely they will consider story lines from anyone except established TV writers - they get deluged with ideas from first-time writers every day, and hardly any get read, much less considered.
Sorry to be a damper.
If you are serious about script writing - try some ideas out on your local Am-Dram society, or see if your local BBC Radio has any outlets - you have to build up some credability before you get a chance at the big boys.