The standard fine for a vehicle parked illegally on a single yellow in central London is £100. If that is paid in 14 days, the fine is reduced to £50. After 28 days, a more costly enforcement process begins. A spokesman for Westminster City Council said: 'If our attendants are aware that a certain person is parking illegally regularly, they will be targeted. Whether that person is you, or I, or Madonna, they will get fined.