ours is up for renewal, always had trackers in the past but last time, 2 yrs ago, went for fixed rate. it was a gamble but with a recession looming, we just wanted to know where we were each month. we got stung as of course interest rates went down, so we've been paying over the odds, but ho hum, i made a decision, you win some, you loose some!
am now at the same crossroads again, 4 yr fixed rate (brings the repayments down by £180 a month) or 2 yr tracker (brings the repayments down by £300 a month). it's a big mortgage, so any changes in interest rate on a tracker make fairly substantial changes to the monthly payment. just not sure i trust the climate enough to go for a tracker though.