SCREEN legend and “national treasure” Julie Walters is set to unveil new 3D breast screening equipment along with a portable ultrasound at Royal Surrey County Hospital.

The award winning actress will officially launch the tomosynthesis machine, which is better at detecting cancerous tumours than traditional breast imaging, during a special ceremony on Friday, January 15.

The 65-year-old star of stage and screen, best known for her roles in Educating Rita, Calendar Girls, Mamma Mia!, the Harry Potter series and Billy Elliott, will be joined by other local dignitaries.