There are two distinct penalties that can be issued dependant on the parking penalty committed.
For certain offences such as overstaying in a limited waiting area the notice amount is £50 although this is reduced to £25 if paid within 14 days.
For more serious offences such as parking on double yellow lines the amount is £70 although this is also reduced to £35 if paid within 14 days.
Failure to pay within 28 days will lead to the Parking Partnership obtaining the details of the vehicle's registered owner and issuing a Notice to Owner demanding full payment. Further delays will lead to debt registration, a further increase in the PCN amount and ultimately to bailiff enforcement.