Speaking exclusively to the Dorset Echo, Sir Keir said he was aware the case would be going through the court so was cautious about making comments but gave a brief statement.
He did not say either way whether the Government would block the plan after new restrictions were introduced.
The controversial scheme received planning permission from the Secretary of State in September, despite major opposition locally, although it still needs a permit from the Environment Agency.
Dorset Council refused planning permission for the scheme at Portland Port which led to the applicant Powerful Portland launching an appeal before a public inquiry was held.
Since planning permission was granted, the Government has introduced new restrictions on waste incinerator projects, now requiring them to meet more stringent local and environmental criteria to gain planning approval.
Under the new conditions, energy from waste project developers will be required to prove their projects contribute to reducing non-recyclable waste sent to landfill or replacing older, less efficient incineration facilities.
New incinerators will also need to be carbon capture-ready and demonstrate how they will utilise generated heat, such as producing fuels for decarbonising industries like aviation.
Powerfuel, the company behind the incinerator, has insisted that it will satisfy requirements, and the project will still go ahead.
A High Court review into plans to build the incinerator has been given permission to go ahead with a date set for March.
This is after campaigners raised enough money to fund a legal challenge.
Speaking exclusively to the Dorset Echo, the Prime Minister acknowledged the ‘strong views’ of residents and said: “I understand that this particular case is in process now at the court.”
He added: “We will ensure that the strict criteria is stuck to.”
Incinerator protests (Image: NQ) In November hundreds of people gathered in Weymouth in opposition to the government decision to green light the project.
Sir Keir Starmer (Image: Czarek Sokolowski)
Incinerator plans have been ‘fiercely opposed’ by Weymouth and Portland residents, refused by the local authority and Labour MP for South Dorset, Lloyd Hatton.
On Thursday, February 6, at 6.30pm, a public meeting will be held at Portland Social Club on High Street in Fortuneswell.
Olympic athletes have who train on Portland have also previously said that they may leave their training place if the controversial plans go through.
They claimed that the incinerator poses a ‘grave threat to the future of sailing in the UK.’