Feargal,
Of course it doesn't make sense to keep on paying for her insurance when she's not even using it. However, there are no insurers who will take on board drivers who are only 19 for short term insurance. Having said this, you need to understand that "short term" refers to a period between 1 to 28 days (a maximum of 4 weeks). Although temp insurance is not an option here, your daughter will qualify for pay-per-month car insurance which is basically insurance cover on a monthly basis. A calendar month can be upto a maximum of 31 days and with eCar Insurance there's no age restriction as long as you have your full driving licence. It's called Pay As You Go but it's really a pay per month policy.