Mystery flight G-IASM

[F-EGPD4]

I have been following G-IASM with interest for the last few days. It has been heading out into the atlantic from Prestwick. When out of tracking range its several hours before FR24 picks it up again on its return journey to either Prestwick or Londonderry. Cant figure this one out. Whats the mystery destination?

[Oblivian]

Looking at their socials they do varied stuff from Training to survey to medi-vac

They seem to do a bit for oil industry and recently coastguard with King Airs
https://twitter.com/2Excel_Aviation/...03440338251776

2Excel Capability Development has certified a number of innovative approaches to create aircraft level installations, from Boeing 727 spray systems to King Air surveillance platforms.