I thought I had lost my old 'P2' Chit forever but came across it today whilst looking for something else.
I got my P2 rating when the CGS Trappers visited Halton during the best month to fly open cockpit in a T31/Mk3.
The 'P2' rating was changed to 'G1' (grade 1) fairly soon after this date.
Now suitably 'Foxed' by age