Peter Harris and family
Hotels, Caravan parks
Rank 2017

More than 4m families annually visit a Butlin’s, Warner Leisure or other holiday destination owned by Bourne Leisure, the Hemel Hempstead business founded by Harris, 83, and the late father of Colin Allen (qv). Profits reached a record £134.1m on sales of £951.4m in 2015 and assets grew to almost £300m. We value the Harris family's stake in the £1.1bn operation at £400m, adding a 60% holding in the £300m spread-betting firm Spreadex. Other interests take Harris to £680m.