Vikki is keeping a web diary of her operation and hospital stay for BBC News Online.
Vikki Thompson, 30, was killed close to her home in Ascott under Wychwood, Oxfordshire, in August 1995.
Two others, Denise Elrick, 22, and Vikki Ann Raeburn, 30, were acquitted of murder during the trial.
Having the operation will reduce Vikki's chance of getting breast cancer from between 50-60% to just 1%.
BBC: NEWS | Health | 'I will lose my breasts to save my life'
Mark Weston, 35, is accused of battering Vikki Thompson, 30, whose body was found in Ascott-under-Wychwood, Oxfordshire, in 1995.
Sir Michael Boyd and Vikki Heywood, the departing artistic director and executive director of the Royal Shakespeare Company are placed fifth.
The couple, and their dogs Malone and Vikki, were eventually sent another driver and they said they continue to use Ipswich Cabs.
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Vikki says she knows that 32 is a young age to be considering such drastic surgery, but is convinced she has made the right decision.
BBC: NEWS | Health | 'I will lose my breasts to save my life'
Vikki's diary will be published on BBC News Online on Tuesday.
BBC: NEWS | Health | 'I will lose my breasts to save my life'
Before her operation Vikki had to give up alcohol and cigarettes.
BBC: NEWS | Health | 'I will lose my breasts to save my life'
Among the watchers was Vikki Bailey, 28, on a sight-seeing trip to London from Canterbury with three friends, who included the capital's new mayor on their list.
His exit led to an overhaul which saw Wood, previously national coach, appointed to the top job with the GB team and Vikki McPherson named as head of performance.
It also worked on the Vikki Thompson murder trial, in which Mark Weston became the first person to face a second murder trial after new DNA evidence came to light.
It is a bumper year for the arts, with the Royal Shakespeare Company's artistic director Michael Boyd made a knight for services to drama, and RSC executive director Vikki Heywood appointed CBE, as they both prepare to stand down in September.
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