Hi BG. I think it will depend on what cover your precise policy gives you. With someone a close as a passenger's father, I know ours would cover cancellation. It would be well worth investigating before you go (or don't go - let's hope you can. I know how much you are looking forward to it.)
If you know in advance that you can claim it will be peace of mind, and if you can't you can a least try to offload the EJ flights.
Best wishes
Phil