Character spacing yes, but also letter layout hence the diagrams .
Rectangular mount is coming off, and the JDM plate mount is going on so hopefully won't look daft !
If I get proved wrong i will eat my hat with a slice of humble pie. Can only go off what the official document says lol.
Just read the document again, nothing in there stating about having to have a rectangle plate fitted. Feel like a bit of an ass for being like this but needs must lol.
SCHEDULE 3 Regulation 12, 13 and 14
LAYOUT OF REGISTRATION MARKS
PART 1
TABLE A
PERMITTED LAYOUTS FOR REGISTRATION MARKS
2. A group consisting of a single letter and not more than 3 numbers followed by a group of 3 letters (for example A123 ABC) - Permitted layouts : Diagrams 2a, 2b and 2c.
That applies to me, and the following applies to people with normal registrations :
1. A group consisting of two letters and two numbers followed by a group of 3 letters (for example DE51 ABC). Permitted layouts : Diagrams 1a and 1b.