Sheryll was born in the village of Millbrook, South East Cornwall, where she went to school before continuing her secondary education at nearby Torpoint Comprehensive School. Sheryll was a member of the Governing Body of the school for nine years.
Sheryll still lives in the village and before becoming an MP she worked for the NHS at a local surgery.
Sheryll was widowed when she lost her fisherman husband Neil to the sea in March 2011. Sheryll has two grown up children. Her daughter Sally is an officer in HM Forces and her son Andrew works in marine electronics.
Sheryll is proud of her South East Cornwall roots which can be traced back across many generations.