As a Londoner, I often forget to do ‘London’ things with the girls. I am so used to seeing the Houses of Parliament from the train when I’m off to buy deadly boring stuff like netball skirts that Pugin’s amazing building has all but lost its charm, while, on a clear day, you can catch sight of the Gerkin on the school run – enough to make anyone a bit blase. At the weekend, though, the magic went back into London living. I…