RAF Finningly 1953..
Having just returned from flying training in Rhodesia,I was posted for jet conversion onto Meteors, at Finningly, Yorkshire.
About half way through the course a few of us read, on the mess notice board one lunchtime, a request for volunteers for take a trial flu injection - there were a few "perks" offered.
Several of my course, including me, added our names to the list.
Returning to the hangars after lunch, our Flight Commander got us together and (Strongly !!) advised us to remove our names from the list that he had noticed several of us had signed.
He said that we wouldnt know what we would be tested for - once they got us there - at Porton Down !!!