The marquees, which can accommodate up to 2,000 asylum seekers, have been bought by Suella Braverman in recent weeks to cope with asylum seekers crossing the English Channel.
Suella Braverman has bought large tents to house up to 2,000 asylum seekers on disused military to avoid using expensive hotels, ahead of an expected surge of small boat Channel crossings.
The Home Secretary will make her first trip to the front line of the political battle as the Government faces legal action over the conditions at the Manston migrant processing centre.
Former residents of the inhumane Manston processing centre have compared it to a filthy prison after catching scabies, having their phones and cigarettes confiscated
The letter, written in broken English and addressed to journalists, organisations, everyone appeared to suggest 50 families had been held at Manston for more than 30 days.