To do the job of locking automatically upon closing, we recommend the Exidor 305 mortice operators. On the inside (push to escape) side of the door you have a normal push bar which comes with a lock case which is morticed into the door. It comes with a euro profile cylinder and escutcheon as standard so guests may enter from the outside with just a key OR, if you would prefer to give guests a code to enter, then the CL1 mechanical digital lock (with a door handle) is compatible. If you decide not use a CL1, then you might add a pull handle to the outside of the door. The 425mm long “D” pull handle in Brushed Stainless Steel is the minimum to meet the Disability Discrimination Act.