"Our article 'Sikh police officer who won hate mail pay out sues again' (22 April 2006), reported that an Employment Tribunal had awarded Gurpal Virdi compensation for racial discrimination following accusations he sent hate mail to colleagues.
"We also reported that a later independent inquiry by South Wales police concluded Mr Virdi was behind the race hate campaign.
"We have been asked to make clear that the then Commissioner and Deputy Commissioner, Lord Stevens and Sir Ian Blair had already provided Mr Virdi with letters of apology accepting he was not responsible for disseminating racist material and that he was a victim of racial discrimination.
"We emphasise that we did not allege that Mr Virdi was guilty of sending racist hate mail and apologise to Mr Virdi and his family if a false impression was given."
Read more here in a Media Guardian article.