On leaving, my RO2 oracle advised me to write a "Dear Betty" letter to the Manning Office, saying I would be unable to fulfill my reserve commitment due to the fact I was getting on with my life somewhere else - or words to that effect. I got a prompt response saying 'Thanks for all the fish, no further commitment". Of course, that was before random politicians decided that we needed to carry out operational evaluation trials of shabby kit all over the globe, so maybe it's not that easy any more.
PS.
Just as well......Turncoats not wanted!
The word is “clairvoyants”