David Lock QC gives an interesting insight into a number of conflicting cases and how recent case law has been shaped.
The conflict is between Laws/Evans on one hand and Doubtfire/Boskovic on the other. Hopefully we will have a defining correction at some stage in the future.
You may read his article here,
Alternately, you may read a copy here.Confusing cases and bad law_ The meaning and effect of decisions made in the police ill-health retirement process_