On 02/12/2014 21:37, Adrian wrote:
On Tue, 02 Dec 2014 20:27:25 +0000, bert wrote:

obviously as it had failed the vehicle is intrinsically unsafe.

Seriously? Do you make this up for fun?

Let's say it failed on the rear fog light. Or the numberplate lights. Or
a tyre - but that's been changed, although there's not been a chance to
retest.

This looks quite straightforward (and definitive) to me

https://www.gov.uk/getting-an-mot/after-the-test

If your vehicle fails the test
Youll get a €˜notification of failure from the test centre if your
vehicle fails the test. The failure will be recorded in the secure
central MOT database.

You can still drive your vehicle if it fails the test and its existing
MOT certificate is still valid (ie you got it tested before the expiry
date). However, you might be stopped by police and prosecuted if your
vehicle is unroadworthy.

If the vehicle fails the test and the certificate has expired, you can
only drive it to:

have the failed defects repaired
a pre-arranged MOT test appointment