NEW Scotland Yard police officers have swooped on the Medi Parc in Harefield to order the development company to stop work.
It is the suspected presence of Great Crested Newts , a protected species on the site, which has led to the police involvement.
Officers from the Met's Wildlife Crime Unit arrived on scene at the Medi Parc in Hill end Road on Monday to speak to workmen, who have continued clearance at the site.
The Medi Parc was originally designated as a medical science park, and had become popular with dog walkers and wildlife groups.
Two weeks ago, out of the blue, bulldozers visited the site, causing wanton destruction, sending deer and foxes scurrying for their lives.
On Wednesday, Comer Homes, the company who own the site, returned, cutting down trees in preparation for building work on site.
They have intentions to build up to 80 apartments on site.
Sergeant Ian Knox, from the Met's wildlife crime unit said they are investigating calls that Great Crested Newts are present on the site.
A spokesperson said: "We are making enquiries with Natural England to establish whether or not these creatures are present on the site.
"Officers have advised the company involved in the site clearance to cease work while this established. "
A Comer Homes spokesperson said: "We have no comment to make at the moment, other than that we have had an ongoing dialogue with police.
"So far there is no proof the newts exist on site, but we have allowed police to conduct their search on site."
One resident, who lives nearby to the Medi Parc, says he has conclusive proof that the newts exist.
Roy Elphick, of Hill End Road, said he took a photo (above) of a Great Crested Newt last year when it was discovered by his son.
"It is proof they exist on the site, I will be supplying this evidence to the police.
"The site has been popular with walkers and the locals for three decades.
"There is no justification for the work that is going on to destroy the wildlife."
The newts also exist elsewhere in the borough, at Uxbridge Common, and are protected under UK and European Law.