I suspect he took his own jet and payed £4000 for the services of another pilot who probably had an adventure of a lifetime.
And to add I think these days you need a valid multi engine IR and full set of ATPL valid exams before you can start any type rating. And also the MCC is its a dual crew aircraft.
But I don't think any of this applies to Monty because to my knowledge he has had the jet for 15 odd years and I doudt he has gone JAR.