OK, i didnt get to see these posts before i did it tonight, i popped open one installed on our front door, just to get my barrings. A few fiddly bits but once a suitable method was found (and stored in my brain

it was simple) I discovered the gentleman was right about one of the latches been stiff... one of the springs had slipped up and was not sprining lol, i'll post a pic of it in a few... just gotta stick my lock back in the door ... I reckon 20 bucks from this guy should cover me

thanks..