A LARGE number of women will be clad in decorated bras on a 14 mile sponsored walk in aid of the Primrose Unit and the Oncology Unit at Derriford. Tavistock Star Trekkers will start at midnight from Morrisons car park and run along the back roads to Horrabridge, Walkhampton, Dousland, Yelverton and Crapstone then again through Horrabridge back to Tavistock ? 14 miles. The walk ? on Saturday, May 20 ? will be started by Mr Drabble, a breast cancer consultant, and Dr Pat Macloud an oncology consultant at Derriford .