Hi From a cold and snowy Minnesota.
I write this after reading a post on my nieces FB page, She is currently in London with a student group. it seems that the service that she is there with has limited spaces on their tours that she would like to go on. So I'm curious if any of you might have any advice that I can give her on thrifty ways of getting out to these places that she would like go to.

She should get an all day pass for rail and underground (subway) when I was there it was the cheepest way to get around....