About Leaving the scene of an accident is a criminal offence — and the PAMAN order: which statements are correct? (multiple answers possible)
You describe as exactly as possible where you are, what happened, how many vehicles are involved and how many (seriously) injured there are — 'that way the right services arrive fastest'.
Even with only bodywork damage to a parked car you must stay and wait on the spot until the police arrive.
Leaving the scene of an accident is only an offence if there are injuries; with sheet-metal damage only, you may just drive off.
The book names location, situation, number of vehicles and number of injured — a driving licence number is nowhere named as required 112 information.
Explanation
With sheet-metal damage only, the police often do not come; the book asks for a photo and driving to a car park together with the other party, not waiting on the spot for the police (Book p.170).