Just an update on this one.
With reference to the fact that there is no requirement to supply equipment for the fire service, how about this one:
I am aware of a relatively recent significant UPS fire (a 6 pump fire I believe - and Colin, & it was nowhere near London, nor did it involve any former, serving or would be London personnel!) where a number of fire and rescue personnel were injured. One issue was the fire and rescue service didn't have enough CO2, neither was there sufficient in the building to tackle this incident which involved live equipment that could not be isolated.
Neighbouring buildings were broken into by the fire service and eventually sufficient resources were 'procured'.
On the strength of this incident, we are now beefing up our CO2 availability in certain premises that have large or complex UPS equipment to provide a pool of FFE resources for the fire service, over and above what may be required for compliance reasons.
Of course, this is entirely a business continuity matter, and as such missed by me when carrying out a FRA. Again, for Colin, London do not carry any CO2, so the situation is even more relevant in the capital. In addition, the LFB training note relating to electrical plant, devotes just one paragraph on UPS's, despite the thousands acres the capital.