In answer to an earlier question it was VT-MST, operated by Asia Aviation Ltd of New Delhi.
It is a charter aircraft, on their Indian AOC certificate, so presumably should be operating in compliance with Commercial Air Transport regulations and adherance of all cabotage regulations as would be required to operate a commercial flight from Kerry to Luton. Like every other foreign operator operating in Europe doesn't, sorry, does.
Regardless of the safety case, it's about time that the Departments for Transport started protecting their own industries by enforcing the Freedoms of the Air - as everywhere else does to UK operators. This is starting to kill European jobs and operators yet there is legislation in place to stop it.
OK, sorry for the rant and high horse dismounted....