Why are people putting up wrong information
To get a tax disk te MOT MUST be valid on the day the new tax starts. If it runs out the day before that is no good. trt's MOT runs out midnight tonight it is NOT valid to get a tax disk for Febuary even if the tax disk was applied for to day or even last week. It the 1st day of the new tax that the MOT has to be valid for. trt HAS to get a new MOT before an application for a new tax disk will be accepted, this applies on line or in person at the post office.
You can drive for 5 days with out the tax disk ONLY IF A SUCCSFULL application for a new disc has been made, so until trt gets a new MOT and tax he/she can not drive after midnight January 31st !