After a little digging on the ECF site I found that the team on Eggheads was the "Pride and Prejudice" team from the 4NCL:
Their top board, grandmaster Aaron Summerscale, wasn't on Eggheads as I guess they wanted to keep it "women only".
Cathy Warwick is the new name of Cathy Forbes. I recognise her, Claire Summerscale and Heather Lang, but I've never seen any of the others before. A pity they didn't have Harriet Hunt in the team, I imagine she'd be pretty good at general knowledge.