Is this now a fail?

On a similar subject, can you still have an MOT a month before and still use car even if it fails (unless its considered unroadworthy) or has that changed now?

Yes, it's a Major Fail. See link below for the appropriate section of the MOT manual.

www.mot-testing.service.gov.uk/documents/manuals/c...2

Don't see how a vehicle with a Major Fail for a missing wheel nut could be considered anything other than unroadworthy by Plod or DVSA!

Seriously just get another wheel nut!

On a similar subject, can you still have an MOT a month before and still use car even if it fails (unless its considered unroadworthy) or has that changed now?

From gov.uk site:

Driving a vehicle that’s failed:

You can take your vehicle away if:

• your current MOT certificate is still valid
• no ‘dangerous’ problems were listed in the MOT

Otherwise, you’ll need to get it repaired before you can drive.

If you can take your vehicle away, it must still meet the minimum standards of roadworthiness at all times.

Edited by Doc on 05/03/2019 at 20:42