A week car insurance for 18 year old

You need to tell me whether your daughter has already passed her driving test or not, that is, whether she holds a full UK driving licence yet. As strange as this may sound, if she hasn't got her full driving licence yet, you may be able to get short term insurance as a learner for her but in the event that she has, 2 weeks insurance cover is not available for her because of her age. If you're under 21 short term car insurance is not for you and you will need to look for an annual policy (add her onto your policy or purchase a policy of her own for her).

At the moment, nobody will insure someone who is under 21 for 1 day. The minimum cover that you can get for your son is for 1 month.

If you already have car insurance in your own name, then you are most certainly allowed to drive your aunty's car with her permission. You need to look for the words "can drive another car with the owner’s permission" on your policy. This should give you third party cover which will allow you to drive her car over the weekend.

If you've never been registered for car insurance or if you cannot find the words stated above, that's when things become difficult. Since you're 18 and all short term policies require that you are 21 or over, you will not be able to get temporary cover.