Healthy women who have a family history of breast cancer could be offered drugs on the NHS to cut their chances of contracting the disease.
Dr Hilary told ITV Daybreak that the offer of medication is a 'historic breakthrough' against cancer prevention.
Currently a draft consultation, he added that the challenge lies with the ability to roll these drugs out across the country.
More top news
ITV News readers have called for the return of the popular Oxo ad series this Christmas as a tribute following Lynda Bellingham's death.
The Duke and Duchess of Cambridge are expecting their second child in April 2015, a statement from Kensington Palace has confirmed.
Downton Abbey's Thomas Barrow has taken the decision to try and 'cure' his homosexuality with painful injections but what are his motives?