Twins stunned to find they have different dads after home DNA test in UK's first case
The sisters are Britain's only known twins with different fathers
NHS hails 'Martha's Rule' as life-saving after 12,000 staff raise concerns about patients
Clinicians, patients and families are increasingly using the initiative to trigger urgent reviews of care
'The symptoms waking me at night were cancer - but doctors missed it for years'
Doctors informed the father-of-two that his condition was incurable, and could only offer palliative care
