David Allan Caswell, publishing under pen name Allan Caswell is an English Australian songwriter and performer, author, record producer, freelance journalist and teacher. Caswell wrote "On the Inside" (the theme from the television series Prisoner) and recorded by Lynne Hamilton. It was a hit record in Australia and New Zealand in 1979. In 1983, his single "The Australia's Cup" peaked at number 17 on the Australian charts.