From the (Conservative) British paper The Daily Mail:
The picture that proves ‘torture flights‘ are STILL landing in the UK
By GLEN OWEN
Last updated at 22:21pm on 9th June 2007
The plane was logged arriving at RAF Mildenhall in Suffolk last weekend, and watching aviation experts said the aircraft, piloted by crew clad in desert fatigues, was immediately surrounded on the runway by armed American security forces.
Its registration number, clearly visible on the fuselage, identifies it as a plane which the European Parliament says has been involved in ‘ghost flights‘ to smuggle terrorist suspects to shadowy interrogation centres abroad.
Records show the plane is owned by Blackwater USA, a CIA contractor described as ‘the most secretive and powerful mercenary army on the planet’.
The vehicle contained four US security policemen armed with M16 assault rifles, who accompanied the camouflaged crew to the airport terminal.
The man, who did not want to be identified, added: “I thought it was curious that they would give a civilian plane an armed guard.”
See also here.