An app is allowing its users send a lump of coal to people on their naughty list this Christmas.

Within 24 hours of ordering, card design app Felt is offering to send the black stuff along with a personalised card.

To add a single lump of coal for delivery costs $3 (£2.24), although cash and flowers can also be sent to those on users’ nice list.

The company is also promising to send coal to the naughtiest public figure, as voted for by users.

So far, Donald Trump is topping the table with Russian president Vladimir Putin and conservative political commentator Tomi Lahren also inching towards the top.