On 31/07/2013 17:16, tim..... wrote:
Just moved into my new flat.

It has DPS "High Security" locks which are (presumably) un-pickable.

However, I have one key which own both the communal front door and my
own flat's door.

I guessing that means that I can't change the cylinder and get a batch
of new keys as they then wont be able to open the front door (unless
that is, there's only one common door keying)...

More accurately, you won't be able to open both with the same key. You
could always have two keys, one for each door.

Colin Bignell