London Marathon is the largest fundraising event in the world. It is hard to get a space in it but it is easier it you run for a charity but they often expect you to raise a couple of thousands of pounds for your place.
you aren't running it, it is a great thing to go and cheer on the
runners! I have already signed up for the Shakespeare marathon later in
the year but I would love to be one of those 35,000 running next year.
The atmosphere is amazing! Check it out!