Hello I will be traveling to Amsterdam with some friends. We will be coming from London but we want to do this the cheapest way possible, does any one have any suggestions?

I would check out Easy Jet. You could probably get a fair under 100 pounds.

If you have the time and inclination you might want to look at the water ferry service. Water transit would probably take about 6 hours. You can go by your rental car or by foot with public tranport to/from the ferry terminal.