The artwork appeared overnight on Sunday near the ferry terminal of the southeastern British town of Dover, which operates ferries to France. Banksy's website confirmed that the mural was done by the elusive artist, who posted two pictures of the work on his Instagram account.
The piece, which is believed to be his first comment on the Brexit vote, appears as tensions rise between Britain's Prime Minister Theresa May and E.U. leaders over future negotiations on the country's departure from the bloc.
According the E.U., the flag's stars represent "solidarity and harmony among the peoples of Europe." Banksy's drawing shows cracks forming as a workman chisels away one of the 12 stars. The anonymous artist previously weighed in on French politics in 2015, when he covered several walls in Calais "Jungle" refugee camp. The artwork there included a stencil of the late Apple co-founder Steve Jobs, whose father was a Syrian migrant.