Legate, that sounds like a very bizarre episode of
Randal and Hopkirk (deceased). 
I had a VERY bizarre dream last night...
A friend and I were in London for no reason. We ended up going to
Boris Johnson's house (he's a national laughing stock and mayor of London) which doubled as an old people's home. He was trying to keep this secret from the press who were hanging around on his porch. In the house we met
Rune who was trying to hide the old people in the attic. He explained that some people kept leaving bombs in Boris' letter box and it was amusing. My friend and I wandered around the house for a while (suddenly becoming Victorians for no reason*) until we discovered that
Lommy and
A little green were working for Boris as security guards and they were not too pleased to find us in the house.
Naturally we ran around for a while until we discovered a room full of wires. For no reason I can understand, we decided that Boris was up to something sinister and so we started pulling all the wires out of the wall and then ran away.
Lommy and
greenie were upset and tried to put the wires back.
All of a sudden, it was nighttime and there was a commotion outside; a riot had broken out. Apparently, we had accidentally cut all the power to London and people were not too happy. I remember a lot of fireworks going off and explosions near the house.
Rune came back and said he knew of a secret exit... Which turned out to be a London Buss which drove through the wall and into the Themes... That's about where it ended...
* I suspect this has something to do with me watching a Victorian episode of Doctor Who before I went to sleep