:::Yeah, sorry about making the Br Eng/Am Eng changes before I went to the talk page.  That's the trouble when something is 'out there' rather than in user space, I suppose.  Anyway, other people in the UK would probably have done as I have did (it's very odd to read something on a UK subject written in American English - although I know that there's a massive German element to it too!), and I'd caution very gently that you must be careful about not getting into WP:OWN territory, so why not sooner rather than later?  I took the British qualifier out for the inspector just because it seemed self-evident that when teh school was based in england the inspectors would be British - they wouldn't have been German, given the situation. I didn't do that with reference to the possible readerships' location, just to remove what seemed unnecessary.  But no worries if you feel it shouuld go back in. 

 It looks like they've split the house into at least two parts - here's a brochure for the 'West House' which looks to be the west wing in the aerial photos. I expect you've already seen it, given your most thorough research, but just in case ... .