Recommended 'Paper Trading' Programs/Methods?

Hello, I am new to trading and would like to start with 'paper trading' for a while until I am more comfortable with how everything works. I am after a good program or website which will allow me to trade without spending. I am based in the UK and will be using interactive investor when I finally get started for real.

I want to trade just shares in the beginning.

Thanks - lots of information on this site.

Paper trading is an effective method to start an investing education within the stock market. With this particular method of trading you danger none of one’s personal cash and also you possess the chance to determine in case your trading efforts is likely to make or shed cash. Beginning little and easy can help you simplicity in to the expertise.

If you are looking for paper trading equities, then check out http://www.strategyard.com/. You can create multiple trading strategies to test your ideas. We also have Web Service API if you are into automating your trades by using a computerized program.