More than likely the rose on the inside handle is a dummy plate tightly fitted. Take a very small screwdriver and try to pry off the inside plate then just tighten the screws. Add a bit of threadlock (from a hardware store) to stop it happening again. If not look for a little hole on the stem between the handle and the rose/plate. It may be one where you have to depress a small spring whilst pulling the knob at the same time. Either way the screws will be under that plate on the inside. Repeat for the outside if required but I doubt it as they will more than likely be 5mm bolts. Very rarely does this type of lock have fixings on the outside or crooks would just unscrew them and open your door!
rdpaterson@dundee.ac.uk, October 2008
