Master of media circus for Madeleine McCann

Clarence Mitchell is not backward about coming forward for Gerry and Kate McCann.

The first anniversary of the disappearance of Madeleine McCann will be marked next week with a two-hour television documentary which is the highlight of a carefully stage-managed publicity offensive.

The fly-on-the wall documentary on ITV1 of Gerry and Kate McCann has been organised by Clarence Mitchell, their official spokesman. The Portuguese press first referred to him as the "man in the shadows" when he took the job full-time in Praia da Luz in September.

The newspapers were reporting the (as usual) private views of the Portuguese police that Mitchell, 47, had been sent in by Gordon Brown, no less – when he was Chancellor – to spy on the investigation, which had been portrayed in Britain as amateur and cack-handed.

But the Portuguese media were wrong on both counts. Mitchell would have had at best only a nodding acquaintance with junior ministers, let alone Mr Brown. As director of media monitoring at the Central Office of Information, he was a back room boy but has never been in the shadows of the police operation.

The former BBC television reporter has loved being centre stage before the cameras in an investigation that has transfixed the world's media. "He is on the TV much more than he ever was when he worked for the BBC," said one former colleague.

So much so that photographers regularly have to shout at Mitchell to get out of the way when they are taking pictures of the McCanns. He remains at his fixed point by their shoulder even during photo-shoots, bucking the trend of media minders who avoid being photographed at all costs.

Mitchell has become such a familiar figure in his open-necked pink shirts that he is recognised in the street and is stopped so often on the forecourts of petrol stations that he now jokes it is because he has forgotten to pay his bill.

After almost 30 years as a journalist, he knows what makes a story and has been extraordinarily successful in maintaining a strong interest in Madeleine.

When interest has faltered he has invariably constructed a story or recruited a big name – even the American First Lady, Laura Bush, is on-side – to a campaign driven by parents who accepted early on that the media was a necessary partner.

Nevertheless, the documentary next Wednesday has provoked controversy because ITV1 has scheduled it against the BBC's The Apprentice as part of its ratings war.

The move has led to the accusation that Mitchell has allowed the parents to be exploited by a commercial broadcaster. The fact that Mentorn, the production company making the programme, has given £10,000 to the Find Madeleine fund has not diminished the fuss: the money will be more than recouped from syndication.

ITV1, with the help of Mitchell, has kept other media organisations from the McCanns during the five weeks of the access deal with Mentorn. The company has secured unseen footage of Mrs McCann, 40, her husband, 39, and their three-year-old twins behind the door of their home in Rothley, Leics.

It includes Mrs McCann breaking down in tears as she recalls the night Madeleine went missing. But Mitchell will be undeterred by the barbs, believing the two-hour documentary the best way to ensure that the search for Madeleine goes global again. This is what he is paid to do.

He always wanted to be a journalist and after O-levels at Friern Barnet School, Finchley, where he was head boy, he joined the Barnet & Potters Bar Times and then a BBC training scheme.

In a varied career he covered the Soham murders and, for two years from 2003, the Iraq war.

He was also on the royal beat when he was known – not very imaginatively – as "Clarence House". But it was as a presenter on various BBC news programmes that he hoped to make his career after years on the road. His spell doing hourly bulletins on News 24 is best remembered for him sleeping through a 3am slot, which had to be filled by a somewhat dishevelled producer. He became close to the McCanns after being sent twice by the Foreign Office to look after them when there were 40 camera crews outside their Portuguese apartment.

As a father of three children, aged two to 11, he has gone through the same agonies as many other parents who feared it could have happened to them. His £70,000 salary, equivalent to what he earned in the Civil Service, is being paid by the double-glazing magnate Brian Kennedy, who has bankrolled much of the McCann campaign.

Surrendering his Civil Service pension will be compensated by the future benefits of his role in helping to make Madeleine's the most heavily reported missing-person case in modern history. Offers are coming in for book, broadcast, and lecture circuit opportunities when he returns to "ordinary life" – and even Mohamed Fayed is rumoured to be interested in hiring him.

Mitchell divides his time between his home in Bath, London, and Rothley and speaks to the McCanns every day. They are grateful to him for raising the profile of the search across Europe and North Africa, through visits to Morocco, Italy, Spain and Germany. But the revelation that they were flying in a private jet was a bear trap that Mitchell should have spotted, and the couple flew home from a trip to Portugal on easyJet.

Mitchell was, as usual, only a few feet away from the couple when they met the Pope in St Peter's Square. He was so overcome he reached out to grasp the papal hand and was rewarded with a blessing and a set of rosary beads from one of the priests in the Pontiff's retinue.

While calm in public, he has often blown up behind the scenes at reporters and is occasionally guilty of overdoing briefings.

In the last few weeks his public approach has changed, bluntly blaming the Portugese police for leaking statements from Mr and Mrs McCann that revealed Madeleine was left crying the night before she vanished.

Mitchell moved from the shadows to being branded a "manipulative liar" by the police and the row ensured once more that the McCanns returned to front pages across Europe. It was a job well done by the man at the centre of the story in his own right.