Proctor query

In response to a query on a different forum, I have been sent the attached images showing radio trainer Proctor IVs from an old edition of an aviation magazine (I believe it may be the “other one”). However, I know nothing of the unit or location. As far as I can see the interior shot is not same a/c as the external shot (note the different camouflage), but the cowling markings under the door look like the same. As to the serial of the exterior shot airframe, it is just decipherable as **184, which the original sender assures me was NP184 rather than the alternative option (RM184).

So: does anyone know what training (or other) unit this represents, and where the aircraft was based? A long shot, perhaps, but I hope somebody can help me find some provenance for these images.