from the government website, no mention of millage, just needs to be booked in.
http://www.direct.gov.uk/en/Motoring...Mot/DG_4022108
The need for an MOT certificate
It is generally an offence to use on a public road, a vehicle of testable age that doesn’t have a current test certificate, except when:
- taking it to a test station for a test booked in advance
- bringing it away from a test station after it has failed the test, to a place of repair
- taking it to or bringing it away from a place where, by previous arrangement, repairs are to be made or have been made to fix the problems that caused the vehicle to fail its test