Graffiti artist Banksy has lost a legal battle over one of his most famous artworks with a greetings card company. The artwork, known as Flower Thrower, depicts a masked protester throwing a bouquet of flowers. It first appeared on a wall in Jerusalem in 2005, and was appropriated by a UK-based card company, Full Colour Black, for use on greetings cards. Banksy successfully applied for an EU trademark for the work in 2014, and in...