Client conundrum: Mortgage overpayments versus investments

I've become a statistic. I'm a homeowner who is soon coming off a cheap fixed-rate deal and into the fiery hell that is the mortgage market today. It's estimated that around 1.4 million people will see their mortgage deal come up for renewal in the coming year, which means a lot of households face a big hit to their incomes. And while some might have buried their heads in the sand, I don't have that luxury. As someone who crunches the numbers every time the Bank of England increases interest rates and works out the dent it will make in the nation's monthly mortgage payments, I'm keenl...