Just checked Flight Arrivals for her flight...
14:35 AA6464 BUCHAREST
EXPECTED 1416 Terminal five
Thank goodness for that, it gives her more time for her transfer to Gatwick.

It is very stressful these days for occasional travellers, and even seasoned travellers, to have to leave the airport then travel by coach, which you need to book yourself, to travel to the other airport. She probably will have checked straight through from Bucharest to Jersey but she will still have to collect her baggage and take it herself between airports.