There were a bunch of trial floatplane conversions in WW2:
There WAS a British twin-engine floatplane conversion… but of a light bomber:
Bolingbroke Mk III :Floatplane conversion of sixteenth Bolingbroke Mk I, with two Edo floats.
Too much spray got into the engines, so it was “de-floated”, and the project cancelled.

But they converted only one (717).
The Bolingbroke EDO 53 floats look big (11700 pounds of water displacement) – but nothing compared to the Douglas XC-47C EDO 78 floats: 29400 pounds of water displacement!

a quick look at Google.maps
“RAF Warwick
1941 Opened 23 Gp (Pilot) Advanced Flying Unit 1945 Closed”

ATDU – surely Air Torpedo Development Unit?

Thanks for clarification!

Maybe this is an answer:
“…the first production batch of thirteen Bristol Type 164 Brigands, RH742 – RH754, equipped as TF.1 torpedo-fighters, which served at Development Units at Gosport and Thorney Island from May 1946, but never entered service with first-line Coastal Command Squadrons.”
http://www.facebook.com/note.php?note_id=117704044934965
ATDU (Armoured Trials and Developement Unit)
e.g. RH746 was at ATDU Gosport in ’46

Guess you already know that they’re mentioned here
http://www.worldairforces.com/Countries/iraq/irq.html
But is it a reliable source?

quote: A google search has not yielded anything to date.

“Samuel C Dunlap III”
I’ve got three hits with google:

“Her instructor was an old friend, Maj. Samuel C Dunlap III, at that time the Operations Officer, 6th Ferrying Group at Long Beach.”
‘Nancy Love and the WASP ferry pilots of World War II’ by Sarah Byrn Rickman

USAF Incident and Accident Personnel List
http://www.accident-report.com/crews/alpha/namedibb_dz.html

Charleston Air Force Base
Base Commanders: Col Samuel C. Dunlap III, 1 Jun 1945-Apr 1946.

Martin

… and this one http://forum.keypublishing.com/showthread.php?t=88409&page=8 #232

Do you mean this gentleman?

http://www.slideshare.net/magickpyggie/william-hugh-ewen-scottish-aviation-pioneer
http://earlyaviators.com/eewen.htm
http://1stflyingscot.co.uk/index_files/Page729.htm