A recent correction from the Mail on Sunday (wonder why this is being corrected now):

Corrections and clarifications

On November 4, 2018, we said the TV detective Mark Williams-Thomas was first to publicly identify the comedian Jim Davidson when he was arrested on suspicion (later cleared) of sex crimes.

In fact, Mr Williams-Thomas was not the first, and we apologise for this mistake.
Presumably, this concerns this article by David Rose and Rosie Waterhouse:

How a self-promoting TV detective, obsessed with celebrity sex abusers, helped police ruin the lives of Sir Cliff and a string of other famous faces... who all turned out to be TOTALLY INNOCENT

Another version, dated 4 November 2018, with the apparently incorrect information about MWT being first to publicly identify Jim Davidson, is available on Pressreader.

A quote from the article:

Publication of suspects’ names by police in cases like Operation Yewtree would now breach professional guidelines issued by the College of Policing, which say that if a name is released before charge, there must be ‘exceptional circumstances’. However, seasoned detectives say that the guidelines merely enshrine procedures which were already well established in the period 2012 to 2014, when Yewtree was at its height.

One former detective said: ‘The only time you release a suspect’s name before charge is if you don’t have the evidence to charge and there’s a real danger to the public. Otherwise, you just don’t do it – it’s reckless and unethical.’
Compare: "I think my moral compass is high, I think my values are high" (says MWT, who, months before Rolf Harris was charged, tweeted Rolf Harris's name in "real time" as he was being questioned by police, seeming to suggest a degree of cooperation between MWT and Operation Yewtree.)