Originally Posted by Oakvillian

The "proof of funds" is just that. You don't need to have the funds physically with you (banker's draft etc), but you may be asked to prove that you have those funds available. Available means they must be readily convertible to cash - for example, a bank account statement would do; a property valuation of a house you haven't sold yet would not.

Chances are you may not be asked for anything at all, it seems a bit hit and miss whether immigration officers request to see proof of funds, but it would be wise to have a suitable document available in case you get a stickler!