BBC WRITERS ROOM
If you haven't already found this, then take a look at the BBC Writers Room opportunities page.
You'll be a little late for the ones currently posted, but it's well worth bookmarking the page and dipping in once a week, just to see what's available. If writing for TV is something you've considered, this is definitely a website you need to be keeping an eye on.
Personally, the The Script Library is my favourite page and I'll admit, reading through Sally Wainright's superb Happy Valley script makes me green with envy. I love the realism of her fierce and broken females and the rhythm of honest, punchy dialogue. It's inspirational.
Don't take my word for it, take a look yourselves. You won't be disappointed!
And if anyone else is as infatuated with Sally Wainwright's excellent writing as I am, follow this link to the Writers Room Blog where you will find an interview with her.