It is on the way although I grant you it doesn't normally stop over.
LHR LEFT THE GATE 2053
TOOK OFF 2059
AIRCRAFT FORCED TO RETURN
ESTIMATED TIME OF ARRIVAL 2206 PHX
KEF DIV PHX KEF
COMMERCIAL PUBLICITY/PASSENGER
CONVENIENCE, VIP
ESTIMATED TIME OF ARRIVAL 1820 KEF
AIRCRAFT LANDED KEF 1850
AIRCRAFT ARRIVED AT GATE KEF 1858
ESTIMATED TIME OF DEPARTURE 2000