A carriage on the London Circle line was visited by the artist Banksy and his corona-inspired work If you do not mask, you do not get, which would inspire Londoners to use face masks in public transport.
However, the Metro company Transport for London treated the work like any other graffiti and the paintings were removed when Banksy posted the film about its creation.
Previous works by Banksy have been sold on sale for SEK 120 million.
See the paintings in the clip.