Stock Trading and Other Things

How can you buy shares without going to the stock exchange?

I know you get some people on phones, but I don't know anyone who goes there. Are there like agents or something?
And I'm most interested in the London stock exchange or alternative investments.

Public Comments

1. You contact a stock broker

Geez

2. I have met similiar problem before, here list of sites http://infobusiness1.notlong.com/9AAcTho

3. contact a broker!!

4. You are not allowed in the stock exchange. You have to contact a Stockbroker.

5. You can't really.