A headteacher of a Buckinghamshire grammar school has apologised after tweeting a photograph of his pupils 'blacked up'.
Stephen Lehec posted the picture of the students wearing dark face paint while dressed as the Jamaican bobsleigh team from the film Cool Runnings.
The pupils donned outfits, wigs and then 'blacked-up' their faces for a fancy dress event at the all boys school.
The photograph was swiftly deleted shortly after it was posted but not before it was slammed by other twitter users.
One wrote: "Aylesbury grammar school students 'black up' for a bit of fun?@AGSheadmaster's timeline makes the 1950s come alive!"
Another blasted: "Why did @AGSheadmaster think it acceptable for pupils to do this?"
The year 13 pupils at Aylesbury Grammar School were attending a movie-themed event to celebrate the end of their time at the school.
Mr Lehac, who has been head for five years, has now apologised "unreservedly" for the gaffe - and admitted he exercised "poor judgment".