If you have a temporary change of vehicle (for a period of not more than 2 weeks) you will need prior authorisation from us to use your permit.
Os ydych chi wedi newid cerbyd dros dro (am gyfnod o ddim mwy na phythefnos) bydd angen i chi gael caniatâd gennym ni ymlaen llaw i ddefnyddio'ch hawlen.