Yes it has bought someone over!!!
Now then...This is an RAF picture, the other ranks in the pic (not the officers) are wearing the 1922 pattern of service dress tunic...
I would go again for a meteorological section, of the RAF in fact the GR thing says "stores".
The two chaps at the back have W/T headphones on and have wireless operators trade badges on...
None of them have puttees on, but they do have turn ups on their trousers...
The civvy chap in the homburg looks to be late 1920s early 1930s.
All the NCOs and officers have WW1 medal ribbons on, so deffo post WW1, and deffo post 1922...