if i leave the house there's two doors. one into a sort of pre area where the bins are and then one into the house. the inner door has one key of this type

http://www.eltonlockservices.co.uk/KEYS/chubb%20bump%20key.jpg

but on the inside it has a manual twisty thing which is pretty great you can just do that behind you on the way in

the outside door has one of those BUT ALSO a more usual key

http://www.westhampstead-locksmiths.co.uk/images/key%20chubbKey%203G11.jpg

the more usual key works from either side of the door. the other type of key only works for the outside and has twisty manual thing on the inside.

so that's what's going on. what about you?