If you have a temporary change of vehicle for a period of not more than one week (e.g a courtesy car whilst your vehicle is in for repair/service or a hire car) you can use your visitors permit.
Ar gyfer teithiau hirach, fel teithiau y tu allan i'r sir, anogir staff i ddefnyddio opsiwn hurio car gan yr ystyrir mai dyma'r opsiwn mwyaf cost-effeithiol ar gyfer teithiau milltiroedd uwch (e.e.