The guitar is a 100% stock Bernie Marsden SE from 2012 (No. M30266).
Amp is a Mesa/Boogie Express 5:50 plus head through a Mesa 2 x 12 cab. "Drive" channel, 50 watt option, with gain set at about 1:00.
Actually,
this guy.
Truly, the Bernie is the best $700.00 I've ever invested in a guitar.
Funny you mention John McLaughlin. There are a few recent interviews (last 3 or four years) on youtube where he seems downright angry/bored with the current state of jazz guitar in general. He seems thinks it's too "polite" and "safe", etc. You get the sense he'd love to plug back into a Marshall after all these years.