BOAC...
Sorry but you're wrong on that last post (re PAR v/s SRA). As a result 'tis you who may be confusing some folks.
The RAF (and indeed the USAF, RCAF, RAAF, etc) often practised "No Glideslope" PAR approaches -- exactly as described by Fox3WMB. The intent was of course to simulate the scenario wherein the vertical portion of the PAR system (glideslope) is unserviceable. The practise paid off well for both PAR controllers and pilots, as I personally know of more than one occasion when the PAR glideslope info was U/S or unavailable when PAR was the only available approach aid.
grizz