Car Insurance - finding my insurer

[mikebradford]

We have a number of cars and one of them I received a car insurance renewel email.
This was for sainsburys car insurance so I managed to log in. However the policy documents imply my insurance ended with them over a year ago.

So I assume they simply have me on there database and took a chance to email me a quote.

However I then realised I had no idea who insures that car.
I searched MID which shows my car insured.
However not the name of the insurer or when the policy ends.

We've searched our banking and emails which found the insurance for our other cars as well as historical insurance.
But nothing relates to my car in question.
I assume I paid the premium in one payment hence no direct debit.

Is anyone able to identify my insurer?
My cars reg is W5 MWA
It's a silver golf

Any help on the matter is appreciated.

[Robertb]

I think you can get the details from MID, for a small fee.

[mikebradford]

Just had a look
It appears for £10 I can find out the other person's insurance details if I fill in a form implying I've been in a crash.

I'm weary of filling it in with my own details as it may log my car being in a crash.

However askMID on another page it appears you can search your own car.
Unfortunately this page doesn't want to load for my wife or I.