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Thank you both. Hiya Mr Builder, you remembered me!! I'm afraid I chickened out of the door knobs it all sounded too easy to get wrong although I still have your instructions pasted in my documents. Consequently I now have both the living room and the bathroom doors that will not close, although of course i can lock the bathroom from the inside (!) but not to worry I am now thinking that i will have new knobs when I get the paintwork done brass ones are so old fashioned now (at least that's what my daughters tell me ha ha)