Jeez the rubbish on here is increasing by the hour
Re Ejector seats
CAA pub CAP 632 deals with operation of permit to fly ex-military aircraft on the civil register.
Chapter 5, page 17 clause 5.8 and especially the last sentence in the paragraph extract quoted below
"Where ejection seats are an integral part of the aircrew escape system, as
specified in the relevant Pilots Notes, Flight or Aircrew Manuals, it is
recommended that they be fully serviceable for all flights. Approval should
be sought from the CAA (Application and Approvals) at the earliest
opportunity if it is intended to operate with inert ejection seats (or other
escape systems). It is unlikely that the CAA will allow swept-wing aircraft
fitted with ejection seats to be flown unless the equipment is fully
operational."