What better for the tube geek than to drift off to sleep with the comforting glow of a London Underground roundel keeping the monsters away.

From today, the London Transport Museum shop will be selling these TfL licenced London Underground Lightboxes, which also come with 10 interchangeable station signs, including the classic ‘Mind The Gap’ slogan.

They are sold as a battery powered free-standing or wall-mountable lamp and cost £40 each.

Update: Been informed that they are also powered by a USB cable which is included so it can be run from a computer, or suitable mains power adapter. They’re also sold out, but more stocks are on the way in a few days.

Additional interchangeable signs included with the lamp are Covent Garden, Piccadilly Circus, Waterloo, Oxford Circus & Kings Cross St. Pancras.

The lamp’s dimensions: Height 28cm, depth 5cm, width 36cm

On sale from today at the London Transport Museum shop