A clue, one of the buildings has an oriental feeling to it (and it's not Brisbane Road!) and the other was demolished only a few years later. Neither of them are in Central London.
That's one of them Yorkie. The main building was destroyed by fire in 1936. The North Tower (one of the water towers) was used by the air force for this purpose up to it's demolition in 1941. So, only one to go. For the other one - think Chinese.
The pagoda in Kew gardens was the other one Yorkie, it's all yours.
The only person I could think of who that might be is Les Simmons.
Don't know if this is unique in football or not - but Watford once played two Football League matches on the same day. When and against whom? For a bonus point, what were the scores?
Just went back and checked the WO. It was Christmas Day 1940. The first game at Luton in the morning resulted in a 2-2 draw; the return match in the afternoon finished 4-1 to the visitors. I knew I remembered reading it.