We may be arguing two different things, however;
In the inter war period the RAF was not interested in either of these roles which it thought, and repeatedly said, was the role of the Army and its guns
During the inter war period the Army got
NO new guns for such use and not only no "new" guns but NO new builds of old designs. It was only at the end of the 1930s that design work made much progress on the 4.5in
gun and the 5.5in. And the first 4.5in guns were mounted on old 60pdr carriages. many sources claim this was in the 30s but while that is technically correct it is quite misleading. Only about 19-20 conversions were made in 1938-39 with the vast bulk of the conversions being done in 1940 (209?).
There may be some confusion as to what the army's position was, what the RAFs position was (behind doors) and what the politicians position/believes were or what they were trying to impose on both the Army and RAF as part of controlling expenditures (like restricted the wingspan of the Short Stirling to keep down growth and cost).
BTW the quote about the duties of the Army cooperation squadron is from a 1939 edition of "Flight" so it seems to pre date 1944 by quite a bit.
The Lysander takes a bit of explaining as it was a priority program in 1939-40, first flew in 1936 and was going into squadron service in 1938 (?) and the gun armament and bomb load of a Hs 123.
Some Lysanders could carry four 20lb bombs (or smoke floats) on a rack under the rear cockpit.
Internet dispositions seem to be allover the place.
The RAF
may have promised the politicians that they would/could support the army and so the army didn't need to spend money on new guns (give it to the RAF instead) even if the support turned out to be lacking in practice. The RAF did spend a bit of money on the Hawker Henley, the Fairey P.4/34 and the Bristol 148;
The Bristol was built to the same specification as the Lysander and had the strange provision for the rear seater/gunner to be able to lay prone in the bottom of the fuselage in order to aim the bombs ?????
A rather strange provision for plane intended for tactical reconnaissance, artillery spotting, message picking up and transport of army staff officers.
Granted the RAF didn't actually use ANY of these aircraft to support the army in tactical operations but there sure seems to have a lot of activity going on design wise for types of aircraft that
could potentially support the Army.