From 6 April 2015, Local authorities must give a 10 minute grace period to vehicles parked in dedicated paid for parking bays after the expiry of paid for time. It is not a free parking period and in order to benefit from it you must have first paid for parking.
There is also a grace period at the start of parking controls. So for example where parking enforcement starts at 8.30am, if you are already parked in the space you will be given 10 minutes before a penalty charge notice can be issued.
The grace period only applies to paid for parking bays. It does not apply to resident’s permit bays or yellow lines.