Mark's right.
From:
ROAD TRAFFIC
The Road Vehicles (Display of Registration Marks)
Fixing of front registration plates: vehicles registered on or after the relevant date
6.-(1) This regulation applies to vehicles, other than works trucks, road rollers and
agricultural machines, first registered on or after the relevant date.
(2) Except as provided in paragraph (5), a registration plate must be fixed on the front of the
vehicle in the manner required by paragraph
(3).(3) This paragraph requires the plate to be fixed-
(a) vertically or, where that is not reasonably practicable, in a position as close to the
vertical as is reasonably practicable,
(b) in such a position that in normal daylight the characters of the registration mark are
easily distinguishable from every part of a relevant area having the diagonal length
specified in paragraph (4).
(4) Except as provided in paragraph (3) that plate must be lit in the manner required by
paragraph (5).
(5) This paragraph requires the plate to be lit so that it is easily distinguishable from every
part of a relevant area having a diagonal length-
(a) in the case of a plate displaying a mark having characters with a width of 44
millimetres, of 15 metres, and
(b) in any other case, of 18 metres.
Makes dashboard/window mounting illegal as well.
Bikerz, I have a 28 page pdf of the complete regulations.
I can email it to you if you want to have a boring read through it all :lol:
John.