Despite her reassurances, Cooper's not entirely convinced that Clara won't be in some form of danger if she helps. What can he say? 'I forbid you to help after telling you everything because I have a bad feeling.' Yes, that will work out well. All he can do is sigh heavily and give in.

(He is indeed taller than she is by a good four inches. Lucky for him; he's used to being the shortest one in any room.)

"Alright, alright. If you want t'help, I can't stop you. Just be cautious about it. I've been searching a different territory every night. Can't go into some places, of course. The East Enders would eat me alive if I were to turn up in Newham or Barking." Territory lines that a new vampire, scared out of his mind, wouldn't think twice about crossing if he was consumed by bloodlust.