Context
In the spring and summer of 1991, several airliners flying in and out of the London area reported objects nobody could name. An Alitalia crew reported one on approach near Lydd in April. On 1 June, a Britannia Airways flight from Dublin to London reported a yellow-orange cylindrical object, ten feet long. On 15 July, another Britannia Airways 737 reported a small black lozenge-shaped object. Between them sits the Dan-Air case.