An artist has sneaked a painting into the Saatchi Gallery to protest at the absence of British artists in its latest exhibition.
Semple previously made a memorial to destroyed British art
Stuart Semple put a canvas bearing the words "British painting still rocks" in the London gallery.
The Triumph of Painting: Part Two shuns home-grown artists in favour of one Polish and five German artists.
A spokesman for the curator said: "Charles Saatchi remains dedicated to British art."
The new exhibition is the second of three shows at the gallery to focus on painting.
Mr Semple, 24, managed to avoid security and install his 29in by 29in canvas in a room containing work by the Polish painter Wilhelm Sasnal.
He said: "I've spoken to a lot of British painters and they find the fact that British talent has been left out of this new show very offensive.
"There is a whole wealth of amazing young British talent out there. Leaving it out is very wrong and makes no sense whatsoever."
Last year Mr Semple, who previously worked under the name Nancyboy, made a memorial to the millions of pounds worth of British art destroyed in a fire at east London's Momart warehouse.
Mr Saatchi has been a collector and exhibitor of British artists for the past 15 years.
His spokesman said: "This is a one-off show in which he focuses on a current favourite of his - German artists.
"That's not to say that that he is not deeply interested in the British art scene."
Triumph of Painting: Part One included work by UK artist Peter Doig and November's final instalment will exhibit work by fellow Briton Dexter Dalwood.