Would anyone like to venture the designation for the HFL Burmese Mk IX.

Following its conversion to photo recce capability but maintaining the wing armament would this make a PRLF IXe?

I’d suggest just FR.IXe. Not sure if it’s a genuine designator, but in keeping with the later FR.XIVe. I’ve not seen any primary sources with FR.IX listed as a mark, but I know that the RAF did had armed Mark IX’s with cameras.