My mother’s car has been towed away for road works in Avenue Road E7 0LA whilst she was in hospital. She was not aware of any parking changes as these occurred whilst she was in hospital.
Won't win the day as written IMO.
For example, she has a res permit; notification regarding works sent out 2 weeks prior to suspension and removal; mother in hospital for planned but short-term procedure(my cousin's just been in and out in 3 days for a replacement hip); mother knew the situation and could have made alternative arrangements either by moving the car or arranging with another person in her household.....is unlikely to persuade an adjudicator that the 'circumstances of the case' warrant cancelling the PCN and refunding fees. However other facts correctly presented could.
So OP, details pl. I've tried to scope the issue above e.g. why on hospital, her personal circumstances as the vehicle, household, parking and time in hospital, prior notification if any(planned or emergency suspension) etc.