I think it speaks to the quality of the show that for a second I considered the possibility that one of the parrots would somehow blow Briggs's cover by repeating something he said to Mike at some point. 

That is how I thought about it as well. I am not sure that Darby is involved.  He may certainly be, but I thought due to the rugby connection and such, that this was a Stephen-only idea.  Time will tell.