If you have not yet discovered it, have a long look at the BBC Academy website, and in particular the College of Production. There is a wealth of useful information about working in broadcasting, and not just in the BBC.
“About the BBC Academy: We’re the BBC’s centre for training, where you’ll find the Colleges of Journalism, Production, Leadership and the Centre of Technology. We put training and development at the heart of the BBC and also work with the wider broadcast industry, equipping people with skills they need for a lifetime of employability in the ever-changing media landscape.
We also have a Charter remit to train the wider industry. We aim to share as much of our training as possible with the wider UK broadcasting industry for free.”