Senior author Professor Anthony Swerdlow from The Institute of Cancer Research said:
By following such a large group of women over such a long time period, we have created the most detailed picture yet of the risk that these women face. Importantly, our study enables this group of women to receive clear information about their personal breast cancer risk, to help their doctors and them to make decisions about preventive measures. It takes us a step closer to more-personalised medical plans."
More top news
Mist, low cloud and hill fog forming again overnight, although mainly dry. Brightening up duirng Tuesday. Warm in any sunshine.
A sergeant in charge of officers policing fans at the turnstiles was taken "out of action" for an hour before the kick-off to write reports.
Very warm air heads up from Spain this week - but will it be dry and sunny?