Quote:
Motorcycles and tricycles
There are separate provisions for motorcycles and tricycles. This means, motorcycles registered from 1 September 2001 must only display a number plate at the rear of the vehicle.
Motorcycles registered before 1 September 2001 can display a number plate at the front, but do not have to. The number plate must be a “2-line” number plate and must be displayed on all motorcycles registered on or after 1 January 1973.
requirements for motorcycles shown below.
Character height 64m
Character width (except the figure 1 or letter I) 44mm
Character stroke 10 mm
Space between characters 10mm
Space between groups 30mm
Top, bottom and side margins (minimum) 11mm
Vertical space between groups 13mm
Copied from PDF on following website:
https://www.gov.uk/displaying-number...-number-plates