Hello,
Thanks for all the comments, I was in fact visiting another hospital late last week and they had similar parking arrangements, I asked them what happens in a situation when a legitimate patient receives a parking fine for any reason and they said, oh yes it is quite frequent and if you let us know then we will be able to cancel it.
Which was basically as the comment on this thread, PALS is the first option to explore, so then I called the relevant hospital's customer service team and they confirmed, if I send them an email with the details then they should be able to get it cancelled. I have taken that action and hope it will result in an outcome as expected.
Many thanks!