1 CEU predates the (Wing) Airfield Engineer Squadrons and reserve Construction Engineer Flights which are sub-units of a reserve CE squadron.
https://cmea-agmc.ca/1-esu-75-years-engineering
I remember 1 CEU being in Winnipeg in the 1980s and then moving to Moncton. They are now named 1 Engineer Support Unit and are based in Kingston, Ontario.
this badge has been discussed previously.
https://www.britishbadgeforum.com/fo...gineering+Unit