OK, let me try to provide some clarification as best I can (I'm sure one of the MN midwives could and will do better!):
AFAIK there has been only one Industrial Tribunal ruling to date (Janaway v Salford AHA, 1988) which defined midwifery participation in termination as "actually taking part in hospital treatment designed to terminate a pregnancy". The Royal College of Midwives policy, leading from this, is that the interpretation of the conscientious objection clause should only include direct involvement in the procedure of terminating pregnancy. So a midwife who has declared a conscientious objection cannot be made to do anything herself that will directly help terminate a pregnancy - sitting up an infusion line, for example, or assisting in theatre.
Indirect involvement covers all those activities that are one step away from the termination, that involve running the service that is providing the termination. So: booking a woman in for termination, giving her a cup of tea, drawing up the ward rota. Also: choosing which staff WILL assist the termination, helping them with any concerns they might have. So if a midwife had trouble setting up a drip for a woman undergoing termination, and went to ask advice from the ward sister, the first midwife would be directly involved, the second indirectly involved. If the second midwife (the supervisor) then came in and set up the drip herself, she would be directly involved. At the moment, the situation is that the supervisor would not be expected to enter the room and set up the drip herself, but she would be expected to provide advice and support to the first midwife to help her get her job done (so she might, for example, page the doctor, or ask another experienced midwife to go in and help). If she refused to provide even this indirect support, then you have a problem because the first midwife isn't allowed to practise without recourse to management advice and support.
If a baby is born alive (hugely unlikely) then that would count as a life-or-death emergency and all staff would be expected to do everything they can to save the baby's life. Presumably you have no objection to that?