Off topic yes, but important.
When I did a fair amount of BBC (Enterprises) work they never made me sign anything. When I saw my stuff appearing all over the world as PR puffs in magazines I had the temerity to enquire about further fees. I was told to shut up and swallow or I would never get any more work from the BBC. I shut up AND I never got any more work.
Advice: Avoid.
And we all know the fat, bald little art director I dealt with.. but I can't be too Frank about it can I Phillip?
Thankfully I never had to use my Magic Wand on him, (back on topic, mum)
