If you are less than 30 days from your MOT renewal, you can take the MOT test and keep your previous date. Taking the actual MOT early gives you options if your car does not pass and you need to have time to do the repairs. If you have regularly maintained your car, there is a good chance it will pass. Like many others who tend to put off preventative maintenance, you might need a bit of work to get your ride up to speed.
Getting tested early will give you time to make repairs, re-test, and still be within the required renewal time. The beauty of choosing a garage you trust to perform the MOT and do any required repairs is that if the car is ready for its re-test on or before the end of the next working day, your re-test is free.