Martha's rule, which lets families and patients concerned about their treatment seek a rapid second opinion from medical staff, is already saving lives.

Hundreds of patients have been helped by rule, which makes it easier to get an urgent second opinion.

Martha developed sepsis while under the care of King’s College Hospital NHS Foundation Trust in south London

Martha's rule, which lets families and patients concerned about their treatment seek a rapid second opinion from medical staff, is already saving lives.

Sepsis scheme launched after death of 13-year-old to give better access to a second medical opinion