You may remember a row which developed in December last year between Newsnight and the influential centre-right think tank Policy Exchange following an investigation we did into their report called The Hijacking of British Islam (watch it here.)
We alleged that some of the receipts used to support their claim that extremist literature was widely available in British mosques had been fabricated. At that time Policy Exchange's chairman Charles Moore made an extraordinary attack upon us, but accepted the charges were serious and added: "It should be said at once that they need proper investigation."
So, six months on we thought it was time to go back and check if that proper investigation had been carried out. You can read Richard Watson's account of what happened next here.