Leave my uk car in spain

Hi if I drive my car to spain from the uk it will be fully covered by my uk insurance company. Then I was thinking of flying back to the uk after 1 month and leaving my car at my property. I wont be a Spanish citizen but will fly back to spain for a month at a time so that way I will still be within the 90 day rule within the 6 months. Therefore I will only be using my car when i return. I realise my car wont be insured while I'm back in the uk but only when I'm with my car. I will drive it back to the uk when the mot is due. Any information you believe will help would be much  appreciated. Thanking you in advance