Amazon has changed the name of Westminster Tube station.

The company has temporarily christened it "Webminster", instead.

The move is apparently intended as a way of advertising its web services division, which offers things like server space to companies and recently opened up premises in London. But it appears to be mostly confusing commuters who aren't sure why it has happened.

There's no obvious explanation to anyone passing through the station why the famous roundel has been changed. The sign does stand in front of a series of Amazon ads – but there is no explicit connection between the two things.

The change has been made not only on the roundel that people arriving at the station see, but also on the map that sits alongside the trains to help people get around. It isn't clear how long it will last for.

Amazon says that TfL uses its services to power its own network as well as to make its data available so that it can be used by people to make travel-planning apps.

It's not the first time that Transport for London has allowed a company to change the name of a station for advertising reasons. In 2015, Canada Water station was re-named Buxton Water for just one day as part of an £11,000 sponsorship deal related to the London Marathon.