Best Fixed Mortgage Deals Mortgage Fixed Deal Coming To An End. Is It Better To Let It Lapse & Just Pay At The Interest Rate For Now?

Mortgage fixed deal coming to an end. Is it better to let it lapse & just pay at the interest rate for now? - best fixed mortgage deals

Then noted that it would be better, would wait until the interest rate that will agree a new fixed interest rate set interest rates higher.

So what is the best, do what?