i had my car crunched outside a friends on monday evening

guess what...yeah they just fooked off
plenty of white paint deposited on my silver car, front passenger wing wrecked and bumper damaged

you can do it over the phone !
dial 101 and report the incident, you dont need to go to the police station
i was informed by a local beat bobby that you should always report it even without witnesses, in case some one tries to blame you for damaging them