Hi are shorter length number plates illegal ? My car is going in for a m.o.t next week and was going to get my new reg plates made up at the same time , as my new reg only has 5 digits i was wanting to get a shorter length plate made up. will my Audi garage do these for me ? the spacing of the digits will be correct so will this be ok. ive spotted a few with shorter plates , do you get any greif ?