Cait Reilly, 24, claimed that requiring her to work for nothing at a Poundland store breached laws on forced labour.

BBC: Back-to-work scheme breached laws, says Court of Appeal

Cait Flanders is a communications specialist working in the publishing industry.

FORBES: Cleaning Out My Financial Junk Drawer

Costello's previous two marriages ended in divorce, and in November last year it was announced he had split from former Pogues singer Cait O'Riordan after 16 years of marriage.

BBC: The couple met during last year's Grammys