It is your responsibility to ensure your vehicle is examined every 12 months. Without a current MoT certificate, you will be unable to drive your vehicle lawfully or renew your road tax license.
You can book an MoT up to 28 days in advance of its due date. In fact it is not widely known that the expiry date on your new MoT is 12 months from the expiry of your old one. This means you could have an MoT that lasts 13months!
With the computerisation of the MoT testing system by DVSA means police and mobile camera units can now check remotely to see if your vehicle has a current MoT.