 HMS "Walney" was one of four "Sandown"-class minehunters ordered from Vosper Thornycroft on 27 July 1987.She was laid down at Vosper Thoneycroft's Woolston, Southampton shipyard in May 1990, launched on 25 November 1991 and commissioned on 20 February 1993.On 15 May 2006, HMS "Walney" and discovered a World War II bomb whilst conducting a survey of the River Mersey.