I think I read recently she is still training for her PPL, though her partner is a Red Arrows pilot so that will no doubt be very helpful, if not only for the planning and logistics of such a long flight which is a far cry from your average QXC.
I believe she is training in a Cirrus, so a glass cockpit with all the automated controls and FIKI is going to make the journey so much more do-able but unless she gets an IR and builds up some considerable experience - I think its very brave, even if she does have a top team behind her (which I presume she will have, and there would no doubt be plenty of people willing to offer a celebrity such help).