33-year-old Aleisha Rochester underwent a routine procedure at St Thomas’s Hospital to remove abscesses from her left armpit and groin.

But the wound to her left armpit became infected and antibiotics were later prescribed at St Helier Hospital.

But the coroner wrote that they were “not in line with St Helier Hospital’s antimicrobial guidelines”.

Another drug was given to Rochester “which was in line with the hospital guidelines” but she deteriorated and died two weeks later.

Dr Richard Jennings, Group Chief Medical Officer, St George’s, Epsom & St Helier University Hospitals and Health Group, said:

“We know we failed Ms Rochester by not giving her the correct antibiotics, with tragic consequences – for this we are extremely sorry and offer our deepest apologies and condolences to her family.

“We sadly can’t put this right for Ms Rochester, but we would like to assure her family that we have learned from Ms Rochester’s death, and we have taken multiple steps to prevent this happening again. We are now giving further training to staff on the prompt recognition of sepsis, and have taken measures to make sure antibiotic prescribing is done correctly. We are also carrying out regular audits to make sure our guidelines are being followed.”