"Tarnish" or WTN as it appears in FPL form is BAe Systems, but not only the test pilot.
There is an ATP which does the Warton-Farnborough shuttle in the morning daily (and returns at 1730ish).
I am sure the pilots of G-CORP may feel like test pilots as it is increasinlgy unserciceable, when Titan Airways of Stansted (Callsign "Zap") do the work.