unlikely
i crashed my car on my way to work one morning.
i had no phone at the time, so i couldn't call anyone and report the accident, so i flagged another car down and got a lift home.

my wife drove me back a little while later, at which point the police had arrived and they didn't say anything about me leaving the scene, and only expressed surprise that I wasn't injured in any way
( real i'm not happy 'til you're not happy, Tue 31 Jan 2012, 22:55, 1 reply)

That's because there's no requirement for you to report an accident if nobody's been hurt (apart from the driver) or nothing's been damaged (apart from the car).

You only need to report a single vehicle accident if you've:

Damaged roadside property of some permeance (if you've hit a parked car, you need to either exchange details or report it as soon as you can, but no later than 24hrs)
Caused injury to a person other than the driver
Killed or injured an animal (Dog, cow, sheep, horse, donkey)

And then only if there is nobody about with whom to exchange details.
( multijoy, Wed 1 Feb 2012, 19:38, closed)

i knocked down a lamp post and killed tree

( real i'm not happy 'til you're not happy, Thu 2 Feb 2012, 2:46, closed)