When will interest rates go down again and how do they affect mortgages?

Kevin PeacheyCost of living correspondentBBCThe Bank of England is widely expected to cut interest rates on Thursday, with further falls expected during the rest of the year.The Bank's Monetary Policy Committee cut rates to the current level of 4.5% in February.Interest rates affect mortgage, credit card and savings rates for millions of people.What are interest rates and why do they change?An interest rate tells…