Two paragraphs of the letter sent from South Yorkshire Police's chief constable to MPs were blacked out before being released.
In what can be read, the letter says:
South Yorkshire Police detectives are in very regular contact with Sir Cliff Richard's lawyers. Typically this involves a verbal update about once a fortnight.
We have not written directly to Sir Cliff Richard. It is the responsibility of his lawyers to ensure he is fully briefed on the conversations which have taken place with investigators.
This is an investigation which has increased significantly in size since its inception. Sir Cliff Richard's lawyers are aware that there is more than one allegation.
In view of the expanding nature of the investigation, it would be premature and potentially misleading to predict a likely date when it will be concluded; however, we are progressing as swiftly as possible.
More top news
It'll be driest across northern Scotland but rain across southern Scotland and northern England will turn to sleet and snow over the hills.
The death toll has risen to eight with the confirmation on Thursday of two Sydney brothers being killed.
The Duke of York’s accuser says there has been a “credible” death threat made against her.