1Charlie:
I too don't like the UK "descend on the glide" however it is a notified difference from ICAO and is there to try and prevent pilots from descending below their cleared altitude before becoming established on the localiser. Apparently this has happened, the aircraft was not in the safe surveyed area.
I know, cleared ILS means establish on the localiser before descending on the glidepath, but not everyone knows that (they should) and even some of those who do know it do not always abide by it. The UK phraseology is just there to try and help flight safety.