Allegation of fraud.-car insurance?

police take my friend a car for no insurance and no driving licence.he asked me for a help to take the car out because i have a full uk licence.we done the insurance online and next day we was going to the police station for the stamp to get the car.the police arrested us for allegation of fraud on the doents there was my date of birth wrong and my friends too,but i didnt now that because if i do i will never come to the police station with it.i been bailed to attend to apolice station when i came to attend to apolice station they rebailed me and i have to attend again next month. why the rebailed me ?what can they do to me for this offence?i never have trouble with police before.please tell me whats gonna happen thank you...