Looks like a "Ozark Trail Agadez 20-Person 10 Room Tunnel Tent".
"Ozark Trail" is trade name used by Walmart (Asda), I don't know who manufactures them other than they are Chinese.
Reports are quite good on them if you know what you are doing, putting a few extra guys on and things like that. A budget tent of this size is never going to be a straightforward pop-up and forget.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates