Duncan Lewis is launching false imprisonment claims on behalf of people held at the Manston processing facility in Kent.
The Home Secretary placed large numbers of people including families with children in dangerous and cramped, prison-like conditions.
At one stage, up to 4,100 people were held in a facility intended for 1,600 at a maximum, including pregnant women, young children and vulnerable adults with medical conditions.
The internment caused national outrage and prompted a legal action by Duncan Lewis on behalf of a woman held at the camp, Detention Action, and the Public and Commercial Services Union (PCSU), against the Home Secretary for unlawful detention and mistreatment of people at the site.
In response to a pre-action letter issued by the firm, the Government later emptied the site and moved all the residents to new accommodation.
However, the action has sparked calls for a public inquiry and Duncan Lewis is now assessing claims for damages on behalf of former detainees.
Prior to this, hundreds of people were forced to live in tents without beds or any other furniture, where they had been forced to sleep on the ground, with no privacy, often for weeks. A family with young children was forced to sleep on flattened cardboard boxes with toilets overflowing with excrement, a lack of water for washing and no clean clothes. This amounts to mistreatment by the Government.
People should not have been kept at the Manston facility for more than 24 hours. In some cases, the Home Secretary kept people there for more than a month. Our challenge can help bring about justice and accountability for you if you were detained unlawfully at Manston, which would have happened in a combination of the following: