the police have a more accurate system than askmid, secondly if a car does not show on there, they ring the insurance company otherwise they will look like a pair of (o)(o)'s if they took your car off you and then you walk in to the station going "dah da" heres my certificate of insurance.
Askmid is a "aid" to see if the car is insured, so if the OP was about the insurance company updating the national database of insurance, using askmid wont give you the end answer your looking for, as your using a system to check up on a different system, so there will be a delay, or if you were on about the wording of Askmid, then common sense would say if you paid your insurance and you have your insurance documents then your insured
I use MID in work and its a completely (sp?) different amount of information you enter than on the askmid website, so its a "lite" version if you like, as the post above states, MID will have to be up to date within a set time frame however askmid is not what the insurance companies use