Reclusive British street artist Banksy has returned to London's Underground to create a piece of art encouraging citizens to wear a face covering. 

The artist, whose real name is unknown, posted a video on his Instagram account of a man, believed to be himself, in full personal protective equipment disguised as a cleaner.

The video is captioned "If you don't mask you don't get," and landed after the UK government announced face masks would be compulsory on public transport. Masks have since been made mandatory in all supermarkets and shops across England. 

The artwork inside a train carriage features several rats sneezing, while others spray anti-bacterial gel. Banksy also sprayed his own name across the driver's door of the vehicle. 

Several passengers watched closely as Banksy got to work. He has become of the most famous personalities of the modern art world in recent times with a series of inspired works in public places that have integrated art with topical themes.

Transport for London (TfL) said the artwork has since been removed citing its "strict anti-graffiti policy."

TfL did however say it appreciated "the sentiment of encouraging people to wear face coverings." 

"We'd like to offer Banksy the chance to do a new version of his message for our customers in a suitable location," It added.

Video editing: Pedro Duarte