In a low interest environment, the easiest, no thought required thing to do is get an offset mortgage (assuming rates are not higher than "normal" mortgages, you're due to remortgage and the fees aren't prohibitive). The effective rates gained on your savings are the mortgage rate x (1+ plus your marginal tax rate). You're holding cash so the risk is low too. Then when you have time to think about it properly or assess your risk level, you take the cash and treat the mortgage like a normal one.