re: Ejection. Not possible. Ejection seats on ex-military aircraft in civilian hands are either removed or disabled. It is not as simple as having an ejection seat. It (seat, pyros, chute) has to be maintained and is expensive, especially for historic aircraft.
Not for the Hunter flying in Switzerland. The ejection seat are being maintained and the holders are civil club, holders of the different Hunter. But as said, the clubs cannot afford to fit all the Hunter at the same time. This is why they share them
http://www.swisshunterteam.com/