Marks & Spencer has celebrated reaching one million Facebook fans by gifting each fan a penny to donate to charity.

The retailer will match the donations meaning the four charities - Royal British Legion, MacMillan Cancer Care, Shelter and the Newlife Foundation - will share a pot of £20,000.

Fans will be able to make their choice using a Facebook app on the M&S page, which will go live over the next three weeks.

To encourage fans to choose a charity, M&S has commissioned an art installation from a million pennies borrowed from the Bank of England that has been videoed and embedded in the app.

“We’re thrilled to have passed such a significant milestone,” said Lou Jones, M&S’s head of online and digital marketing.

“Our ‘Thanks A Million’ campaign is our gift to every fan and further supports the great work we do with our charity partners through Plan A.”