There are a lot of outlets that you can purchase number plates from it would seam that almost anyone can proclaim to be maker number plate or should I say a number plate maker. In actual fact to make number plates legally in the United Kingdom the vendor needs to be registered with the Driver and vehicle and licensing authority otherwise known as the DVLA.
To proclaim to number plate maker you therefore need to be registered with the DVLA. There are a raft of government legislation regarding the number plate design. this extends to the colour of the reflective used, the font style that is acceptable ( of which there is only one the Charles Wright font) and which regional flag badges can be used.
The government legislation regarding number plate makers also covers the spacing and size of each of the characters used sand the gap between the alpha and the numerical character blocks i.e. ABC<gap>123. The vertical space between blocks is 13mm for all vehicles except motorcycles and tricycles where it is only 11mm, registered maker number plate