What is a drop kerb?
A drop kerb is a roadside kerb / pavement that is angled downwards towards the road to allow vehicles to easily drive up and down the kerb.
Parking in front of drop kerbs is not allowed. It causes obstructions to driveway access, road crossing access and both pedestrian and driver visibility. Blocking driveway and crossing access is inconvenient and selfish but obstructing visibility can be very dangerous to pedestrians and road users.
Parking in front of drop kerbs has been against the rules in London since Section 14 of the London Local Authorities and Transport for London Act 2003 came into force.
"Part 6 of the Traffic Management Act 2004 repeals section 14 and gives all local authorities in England with civil parking enforcement powers the ability to take action when a vehicle is parked alongside a dropped kerb in a Special Enforcement Area (that is, an area where parking is, in all other instances, permitted)."
For more detailed information visit The Department for Transport "Parking on pavements and alongside dropped kerbs"