dangerous driving is a min 6 months CANCELATION of licence
which means if ur currently a p plater, u will go on the NEW p plater laws... no turbos, vtecs, v8s ect...
trick with police i learnt (and u now did to) is ALWAYS state ur name and address (as required by law) followed by a simplle 'no comment' statement.
like u said, if they didnt see anything, no witnesses, they have no grounds to prove u quilty of any offence. where as if u say "omg i was a dickhead, i was trying to do a burnout ect' ur pretty much f**ked =)
gl with it all