If you have no previous I am a loss to understand why such a petty case would end up in the Crown Court. Crown Courts are for serious criminal cases not social misdemeanour's did you punch the cop and break his jaw or something. That is the only way I could envisage you ending up in CC. The idea is for them to fleece you, not spend thousands of pounds on a CC and then give you a £60 fine.
Either you are not telling us the full story or this is bullshit and I have seen some of it on this site.