You need to be able to answer “yes” to at least one of these two questions:
a) If I don’t get a limited licence will I suffer extreme hardship?
Extreme hardship is typically job loss and with it loss of your income and eventually your house. That you would suffer inconvenience in not being able to drive is not enough. So if you can easily carry on in your job without being able to drive, then we’re sorry but yours is not a good case to take to court. But we usually manage to find hardship for our clients that can be characterised as extreme.
b) If I don’t get a limited licence will some other person or some other people suffer undue hardship?
Undue hardship typically means serious financial hardship. (Once again inconvenience is not enough).
Maybe your employer will not be able to replace you and his business will suffer seriously or your children will suffer financial hardship because you won’t be able to provide for them – that’s all undue hardship.
Personal and not solely financial hardships can sometimes be used here. For example Patrick has succeeded in getting limited licences that allow clients to drive other people including children for special purposes.