As of the 12th of March, 2010, the writing, attaching or displaying of any object on the windscreen of a vehicle is prohibited.
For the time being the police will not prosecute drivers who display their circulation licences on their windscreen.
The reason is that the law requiring the displaying of circulation licences, regulation 23 of the motor vehicles regulations, is still in force and has yet to be repealed. It is expected to be repealed soon.
Therefore, a fine cannot be issued to persons who display their circulation licence on the windscreen of their vehicle until the legislation requiring the licence to be displayed is repealed.
Letter on the subject from Police HQ Traffic Branch.