The UK’s first "migrant camp" will open next week following a surge in Channel crossings, it has been reported.
Napier Army Barracks in Folkestone, Kent, will be transformed to hold around 400 people waiting for their asylum claim to be processed, the Daily Telegraph reports.
The Home Office is also looking at other Ministry of Defence Sites around the country to house more people, the report adds.
Local officials have said the move comes with "great concerns" and maintains local communities "cannot support" the influx of people.
In a joint letter to Home Secretary Priti Patel, Conservative MP Damian Collins, demanded the decision to be reversed.
He said: "We have great concerns about the impact this large open camp will have on the welfare of the local residential community and also those people in the asylum system who will be placed at the barracks itself.
In a statement, Folkestone and Hythe District Council cited a "lack of consultation on this matter" and the "exceptionally poor communication" on a local government level.
"We are quite sure that members of the community will have many questions, and we are seeking clarification as a matter of urgency," they added.
In 2020 alone, more than 6.200 people have crossed the English Channel in boats that have reached the UK.
People have been housed in hotels for months, and are rumoured to have cost the Government millions of pounds in fees.
Home Office sources told the Telegraph: “This move will save the taxpayer millions whilst ensuring vulnerable people have somewhere secure to stay until their claim is decided.”
The Home Office also said the barracks will act as a halfway point so people within the asylum system can be prioritised safely.
Training at Napier Barracks will be relocated to alternative sites or rescheduled so no military personnel on site if and when they are used by the Home Office.
A Government spokesperson said: "During these unprecedented times, the Government is working with a range of partners and across departments to secure further accommodation and the MoD has offered use of some of its sites.
"When using contingency accommodation we work closely with organisations, including local authorities and law enforcement, throughout the process to ensure value for money and that vulnerable asylum seekers, who would otherwise be destitute, have suitable accommodation while their claims are processed."