BB are still coming up with tasks that they know will pit Dex and Callum against each other

What does cunning as a lighthouse rat mean lol new one on me

no clue ,probably a film ref ,he does that.

I wonder if Sam managed to convince him that having Dexter with a knife in his hand stabbing someone in the back  would not go down to well.

Not many corners to hide in in a lighthouse YR

BB wonder why they get complaints when they purposely try to rile HM's up.. 

get sick of the game player accusations from all that use that as a negative for voting or bitching about someone.. . . it is a bleedin game. . if they mean dirty game player then say that but don't knock em for playing the game

I think Sam did. Thank goodness, for Callum's sake. The rat thing was Sam's idea? 

ETA. Ah, thanks Olly. I'd never heard the expression either.