"William's uncle Charles Spencer has identical twin daughters and his grandfather Lord Fermoy was an identical twin, " he says.

BBC: Royal baby: What are the odds of twins?

Falls were monitored for three months before the free slippers scheme was introduced at Hellesdon Hospital in Norwich, Carlton Court in Lowestoft and the Fermoy Unit in Kings Lynn, all with units for patients with mental health issues.

BBC: Slippers reduce falls in Norfolk and Suffolk hospitals