[Symbiote]

Do they have tour company logos on? In some parts of central London, there's an abundance of rain ponchos, but that's unusual clothing for a Brit.

I think to really get a representative feel of average London, it's necessary to survey somewhere like Ealing or New Cross.

[k-mcgrady]

It's definitely not tourists, it's usually business people. I'm also rarely in central London these days, and in the east (Zone 2/3) umbrellas are a common sight. I know because constantly manoeuvring my own to dodge other people's :)