The New online MOT has thrown up something interesting.
If you go early for an MOT to give yourself time to sort everything out before the current one runs out, you are now wasting your time.
If the car fails its, recorded online as a failure, if your plate is checked whilst you are out on the road you Could be done, if they bring in automatic issuing of fines for no tax or mot, You Will Be done.
The fact you have an apparently valid MOT beyond the fail date is now irrelevant.
I know nothing has changed from before if you failed , but at least you could still appear to be legal.