Kirk Jones, director of Bafta-winning film I Swear, has said John Davidson was "let down", after the Tourette's campaigner's racist slur was broadcast during the BBC's coverage of Sunday's ceremony. Jones told the Telegraph he initially thought the slur, shouted while black actors Michael B Jordan and Delroy Lindo were onstage, had been contained within the auditorium. "I think John was let down on many, many levels," Jones told the newspaper. "And I think the fact that that [tic] went out for broadcast was perhaps one of the worst ways in which he was let down on the night." Davidson's condition involves involuntary verbal tics, and the audience had been told they may hear some during the evening.…