As regards the RAF Form 167A,I had a feeling it was a record of ‘Trade Test’ or similar…

From the T E Lawrence Studies (Lawrence of Arabia) website – http://www.telstudies.org/reference/tna_air1_2696.shtml

border: 1	cellpadding: 3
[TR]
[TD=”width: 50%	bgcolor: #FFFFFF”]1925/ Aug 20 RAF Form 167. Results of Unit	Group or Central Trade Testing Board Examination and Trade Test Card.[/TD]
[TD=”width: 50%	bgcolor: #FFFFFF”]Lawrence recommended for reclassification as AC/2[/TD]
[/TR]

That link would seem to confirm that F167A is a record of Trade Test/Qualification.

Nice to see Lawrence being promoted from Lt Col to Aircraftman 2nd class 🙂