Hi will the below do for a electric shower isolator
http://www.diy.com/departments/crabtree-1-gang-1-way-50a-white-ceiling-pull-switch/259292_BQ.prd
Crabtree 1-Gang 1-Way 50A White Ceiling Pull Switch
http://www.diy.com/departments/crabtree-1-gang-1-way-50a-white-ceiling-pull-switch/259292_BQ.prd
Crabtree 1-Gang 1-Way 50A White Ceiling Pull Switch