This press release was issued by the RAFM:
THE BRITISH AIRWAYS COLLECTION
The Board of British Airways and the Royal Air Force Museum board of Trustees, is currently reviewing the status of the aircraft in the British Airways Collection, within the context of the new National Cold War Exhibition at Cosford.
The new development at Cosford will enable the Museum’s externally displayed RAF aircraft complete protection within a covered enclosure, whilst keeping them accessible to the public. These aircraft, which up till now have been subject to adverse weather conditions, will be housed under perfectly suitable conditions which will enable their preservation and display for future generations.
The aircraft in the British Airways Collection held at Cosford includes the VC10; 707; BAC 1-11; Trident and Viscount. The collection, which is rendered incomplete without the Concorde, has up till now been on external display in the areas surrounding the main Museum site. The board of Trustees is now considering their future as part of the Royal Air Force Museum collection, as they do not qualify for protection within the Cold War museum.
…Ends
Reading between the lines it basically says that they want five aircraft off their property.