Dave, I think you'd be looking for Mk.2 / 2A anti G trousers, a Mk3C helmet with a P or Q 12 mask and a Mk.27 life preserver (or earlier) with a high pressure PEC and man mounted oxygen regulator. Leg restraints were probably single ring or possibly later double ring types, like those used in Hawk/Tucano. I'm sure a more ancient squipper will be along presently to correct any errors.
Edit, sorry forgot the boots, lightweight brown jobs with big flaps over the laces..pukka bonna jet.