This is a one-sided story. The rule of natural justice requires "Audi Alteram Partem" which means "let the other party be heard." I wouldn't run into concluding that the act is racial discrimination or whatever others may pensive without hearing a cogent and convincing reason from the side of the UK government.
“UK denies 74-year-old Ghanaian permanent residency after 42 years stay - Punch Newspapers”
“UK denies 74-year-old Ghanaian permanent residency after 42 years stay - Punch Newspapers”