Do London Underground use coded announcements at stations?

I have heard the announcement "Will Inspector Sands please report to the station control room immediately" at more than one tube station now. (South Ken on Wednesday 17/05/06 morning was latest). It must be some kind of code as there were alarms going off and i have heard it before. Anyone know what this code means?

Answers:
Here's what wikipedia has to say about it.

Inspector Sands is a code phrase used by public transport authorities in London. The phrase is used in public address announcements at railway stations, theatres, sports arenas, etc, to alert authorities of a potential emergency without causing panic amongst travellers by explicitly mentioning the nature of the emergency. Contractors, for example, are expected to switch off and make safe machinery before waiting for further announcements. A typical announcement runs:

Would Inspector Sands please come to the control room immediately?

Transport for London and the British Transport Police have not publicly stated what the phrase signifies and so its interpretation has been left to interested travellers.
yes they do,i used to work at highbury(arsenal stadium)
we had loads of secret codes there

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