Flood warnings are also in place for the River Severn at the showground and The Quarry in Shrewsbury, Bridgnorth, Hampton Loade and Highley, and Quatford.
In a previously unreleased interview given to BBC Radio Shropshire when Neilson was diagnosed with motor neurone disease two years ago, Ms Bache described how the kidnapping of the 17-year-old heiress in 1975 shook their home village of Highley.