File on 4 Investigates: Missing Billions examines the changes to the financial system over the past ten years, including bank branch closures and the digitisation of the finance industry which has led to many financial assets being lost, mislaid or forgotten. It examines the scandal of £100 billion belonging to you and me, but kept by Britain's trusted financial institutions.

The documentary solves the mystery of some missing church silver, helps a frustrated ambulance worker hunt an elusive pension and hears from the valiant individuals leading the charge to make changes to the finance industry.

Featuring contributions from: Steve Webb (Former Pensions Minister), Helen Boyd (Reclaim Fund Ltd), Derek French (Campaign for Community Banking Services), Duncan Stevens (Asset Tracing Service Gretel), Tom Storey (Vaults Group), Les Clarke (Assets Recovered Ltd) plus responses from the NHS, South East Coast Ambulance Service, Santander UK and Lloyds bank.

Presenter, Simon Barnes

A Rakkit production for BBC Radio 4