FAA have approved the GPS being used by pax as long as it has an FCC endorsement. This after several industry and government studies. Odd that individual airlines in the UK have decided against allowing them. This is uninformed over-reaction.They could foster some good
PR by thinking this through a bit more.
Oh well. Anyone is welcome to use their GPS on my machine any time. (Airbus)
From what I read - the more modern the plane, the safer it is from these various devices. Most at risk have been the classics.