They might get a Section 59 warning, which is a telling off but with consequences if they do it again. The fact that they rang you back to confirm which car and what they were doing makes me suspect this – no need to call you back if they were going to do nothing. Scuse the cut and paste (I’m busy helping the brewing industry)…
SECTION 59 OF THE POLICE REFORM ACT – ANTI SOCIAL DRIVING OFFENCES
New laws in respect of certain anti social driving offences can now be dealt with by Section 59 of the Police Reform Act.
Basically what that means is if you are seen:
Driving in a careless or inconsiderate manner
Driving on common land, a footpath or bridle way or any land which is not part of a road
Driving in a manner which is causing/has been causing, or is likely to cause alarm, distress or annoyance to members of the public.
Then a Section 59 warning can be issued to you. This warning is placed against both the driver and the vehicle and lasts for 12 months.
If the driver of the vehicle or the vehicle with the warning issued to it is then seen driving in any of those conditions again in the next 12 months the vehicle can be seized and, if not collected after paying for recovery and storage costs, it will be crushed. Please note that this relates to either the driver with the Section 59 or the vehicle.