The computer glitch that led to 450,000 cancelled breast screenings

The AgeX trial was set up to test whether cancers could be usefully picked up, without undue harm, in those aged 47 to 49 and those aged 71 to 73.Up to 450,000 women in England were not called for their last mammogram before they turned 70 because of a computer failure that goes back to 2009, health secretary Jeremy Hunt has told the House of Commons.The women were enrolled in AgeX, a major NHS trial designed to find out whether extra screening would protect older women from breast cancer.