"COULD BE A RAMJET AIRCRAFT" - The Luftwaffe created a number of prototype ramjet projects. A ramjet, or a flying stovepipe, is a form of jet engine that uses the engine's forward motion to compress incoming air without an axial compressor.
The UK Ministry of Information is spying on their allies. Neil mentions that "The wartime Ministry of Information was the UK's propaganda agency, so it seems more likely that they were producing a newsreel or similar film."
AGENT GIVENS is no longer --
1. M.I.8. [Signals Intelligence]
2. M.I.14(d) [Intelligence Agency of the War Office]
3. M.I.6. H.Q. [Foreign Intelligence]
4. M.I.6. H.Q. [repeat?]
5. M.I.6. H.Q. for U.E.M. [????]
6. Air Ministry, A.I.1(o) [Political masters of the RAF]
7. B.P.I.E. [????]
8. File. [????]
"FOO FIGHTERS" - Allied aircraft pilots in World War II used this term to describe various UFOs or mysterious aerial phenomena seen in the skies over both the European and Pacific theatres of operations.
"SCANDINAVIAN GHOST ROCKETS" - (Swedish: Spökraketer) rocket- or missile-shaped unidentified flying objects sighted in 1946, mostly in Sweden and nearby countries.
"PROJECT DAEDALUS" - A study conducted between 1973 and 1978 by the British Interplanetary Society to design a plausible unmanned interstellar spacecraft.
"TOP BURNER" - highest priority