A 650 feet long suburban street set with seventeen semi-detached houses was constructed for this movie. Apparently, at the time at least, it was the largest set built in the UK for twenty-five years.
The extras in the Home Guard unit that shoot down the rogue barrage balloon (1:01) were selected to look like the cast of Dad's Army (1968), the beloved, long-running BBC sit-com about the Home Guard.
"News reel" footage shown in the cinemas of the RAF versus the Luftwaffe is actually from Battle of Britain (1969).
The film's title is a shortening of the title of the flag-waving patriotic 1902 nationalist British song, "Land of Hope and Glory", music composed by Edward Elgar and lyrics by A.C. Benson.