The UK Border Agency has confirmed the demonstrator on the roof of the Morton Hall centre in Swinderby near Lincoln is a detainee of the immigration centre.
"There is currently a peaceful protest ongoing at Morton Hall in which one detainee has scaled the roof.
"We are working with the Prison Service to resolve the situation."
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Very windy this evening with gales in some places. Rain moving east
Windy with heavy rain this evening, then gales and showers later on
The 100,000th supporter is set to walk through the turnstiles at the Ricoh Arena tomorrow for Wasps' sixth game since moving to Coventry.