Gawd, where to start? I like tourists coming to see my city, and it's the world's biggest industry, and a big sector for London. But there are just so many of them. I don't mind the foreign tourists so much (except for Italian tour groups who have a real knack of convening at the bottom of escalators/ tunnels or slowly passagiata down Oxford St), theyre 17 million, but the native ones, at a whopping 150 million a year can really clog things up. I notice most foreign visitors have done the research or noticed early on/ read the signs every 3 ft that one stands on the right on an escalator, so people on the left can walk up if they want to be speedier. Native tourists however just don't do this. I live near a big arena, and whenever there's a a concert on, the train is jammed with out-of-towners (who don't move down the carriage and therefore don't let others on), and all 7 escalators at my stop will be jammed with two people standing abreast. Outside London they don't have this rule, so Brits often think it's fine, just like a shopping mall. Theyre not in a foreign country either so aren't as alert to the signage. You don't see this with foreign tourists so much, who will learn quickly after being asked to move.
All it takes is one person standing on the left and a queue can build up behind them, especially if the person behind also thinks that way. Even after the culprit at the front gets off, the queue will always be there from thereon, especially at rush hour (it actually lasts 3-4 hrs).
I know I shouldnt gripe considering the billions theyre pouring into the local economy, and I wouldn't want anyone to not come, but yeah Im a grumpy bastard in my old age.