Thank you for the reply - I didn't want to throw good money after bad and fork out more money on the Sky Controller, though this was also one of the solutions Parrot suggested.
Recently bought a Parrot Bebop 2 drone for my son's birthday. It is a fantastic drone and my son is over the moon. The only problem is the FreeFlight Pro app only works on my iPhone, and not on my son's Android phone (version 5.2.3). Within a couple of seconds of take off the app keeps crashing...