Hugh Quarshie

PA WIRE/PA IMAGES Jonathan Davies, contributor    John McEnroe, presenter and commentator  DOUG PETERS/EMPICS ENTERTAINMENT
As an actor who has impersonated a consultant surgeon for over a decade, I have encountered a range of more or less dramatic medical conditions. But nothing can prepare you for the sight of sick and dying children. Seeing them struggle with common and preventable diseases shames you into a humble and helpless silence.