Well, here's my take:
Left calf pocket: paperwork of unknown nature plus flying gloves. Doubles as primary chip bag hat receptacle (if hat location known). Keep a torch in there too.
Right calf pocket: wallet. Additional paperwork of unknown nature.
Left hip pocket: handkerchief.
Right hip pocket: possible change up to a maximum of £2. Car key.
Left breast pocket: paperwork of unknown nature.
Right breast pocket: phone. Additional paperwork of unknown nature and payslips.
Pen holders: pens and occasionally Spork.
The good news is that in about one in ten changes of flying suit, the paperwork of unknown nature briefly becomes paperwork of known nature shortly before entering the bin.