running no plate, with it in windscreen or whatever, usually all they can do is tell u off and at worst give u a rectification notice, whereby u take it to an MOT station, n they stamp it to say its had a plate fitted. might cost a fiver or tenner at most. then u go cop shop, they see it, job done
if u run an illegal front plate, thats when u get a 30quid fine, as then you blatantly are purposely breaking the law
my mate scriv never runs a front plate on his dub's, infact he turned up at a cruise in cov sunday night, n it was surrounded by police and VOSA vans, and nobody cared his plate was in windscreen lol.