Hi - I've currently got a mortgage with Nationwide which was a 5 year fixed rate that has just reached the end of its term. As a Nationwide customer I have now gone on to a rate of 2.5% which basically tracks the BOE base rate and assumes a rate which is 2% above the current rate. I'm nervous that the BOE rate will rise and the limited fixed rate products that are available at the moment will also rise too. I've seen a couple of good rates which offer a competitive fixed rate for 5 years with no set up fee. If I obtain an offer is it valid for 6 months? I'm trying to put some sort of contingency in place whereby if the BOE rate rises I have a product sat waitingto fall back on that I set up while the BOE rate was low. In effect I want to become a Mortgage Tart. Obvioulsy you could only do this with products that had zero set up costs. Is this feasible or can they pull a product at any time even if you have received an offer? Thanks for any advice.