go into your bank, or look at the banks website, they will list what their fixed rates are for existing business.
Rates will go lower than they are now, but its anyone's guess if the banks will continue to pass on the cuts. The fixed rates you will be offered from the bank will be higher than the standard variable your on at the moments, so it will cost you more money now but it may save you in the future.
The general consensus is, if you can afford the repayments, then don't fix. The banks wont offer a rate they know they will lose money on.