..BB have been doing 'secret' houses../secret rooms../..secret housemates etc forever so I can't believe that they don't assume for the cover thing to be blown and will expect that it will be.../..makes for a more volatile and game-playing house and gets the 'action' started early etc...

I believe Ryan blew it straight away and Andrew had to play it by ear.
Should be a good show tonight

From what i thought i heard.I think Andrew was saying he saw some footage so he could use that to get straight into messing with their heads.Him and Ryan should have agreed on this before going down the stairs but i don't think they did with all the excitement.Ryan however needs to agree with this story now and use it as the reason he's angry with that other lad he knows(can't remember his name) otherwise its all gonna fall through.
However i think the house knows anyway tbf so it doesn't matter all that much.
That's my analysis anyway.

what cover

Praying that he gets ejected

That's the way I saw it too. Ryan blew it almost straight away and Andrew had to invent a cover story fast.