Your driving test could be stopped or cancelled for a few reasons such as:
There is a driving examiner strike – Always check with the DSA first because actually it could still go ahead even if there is a strike on. The only way to be guaranteed a refund would be to check first that it is truly cancelled.
Bad Weather – If there has been a large amount of snowfall and the roads need gritting, then you may well have your test cancelled and re-scheduled. Again, always check first with the DSA. Call the Test Centre 2 Hours before your test on the day to check.
Faulty Vehicle – This is probably the lest likely scenario to happen, and infact we have never come across it in our 10 years of driving tuition. Non-the-less it could happen, and if your vehicle experiences problems on the day then you may be illegible for re-scheduling the test.
You can always check your practical test details online.
This youtube video from DSA also cvers this topic well.
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