we have our mortgage cover, (we've opted for life cover, but I assume the same principal applies), drawdown expected in next month or so, and once we were approved for cover, we signed the policy, but are able to wait for cover to start until we advise them of a date, they also give the first month free, which is handy. organised it through a broker, I know they get a commission, but it didnt cost us anything directly and the hassle involved, was worth what ever it cost indirectly.