“We were detained separately, but after we were released Nancy told me that a nurse at the detention centre told her she was too ill to be detained, but the nurse was overruled by a superior and she was held overnight,”

It's a sad thing when medical staff are overruled by non-medical staff.

Nancy’s body was eventually flown to South Africa on 5 April after the country’s high commission agreed to provide an emergency travel document.

There are some things really wrong with this. The British Home office was desperate to get rid of her then once she died didn't want her body to go? Then they wouldn't release her passport. And finally, the fact that a body needs a passport to travel.