Car parking

A car is parking on the pavement in front of the gate blocking access for my elderly Mother (88 years old who had a stroke May 2020 and needs assistance to leave her property and has a Blue Badge) to get into a car as near to her property as possible No Emergency or Care Team vehicle can get close enough either When visiting (l live in Cambridgeshire) l explained the situation to a car owner and was told that he paid his car tax so would park where he wanted I don’t know if it’s the same person. When l visit one car does keep away