So I've had a little look/see about the plane:
archived 5 May 2023 12:11:25 UTC
archive.md
paps were clearly keeping an eye on Farnborough as they have photos of it arriving this morning in this article, but there was nothing listed on flight radar (I wanted to see if there were any departures listed for tomorrow).
"The aircraft that landed at Farnborough is a 2019 Gulfstream G550 fixed-wing two-engine business jet with 20 seats on board. A new Gulfstream G550 costs $62million, while preowned models retail from $14million.
It is owned by NantWorks, a California-based parent company of firms in the biotech, healthcare AI and mobility industries."
A quick search tells me that it's registration is N178L
https://uk.flightaware.com/resources/registration/N178L
but when you click on the flight tracker on that page you get:
Flight Tracker (en route flights, arrivals, departures, history) with live maps and aircraft photos
uk.flightaware.com
which says:
N178L - NANTWORKS LLC (EL SEGUNDO CA)
This aircraft (N178L) is not available for public tracking per request from the owner/operator.
TL: DR He's actually achieved privacy and it's pretty unlikely we'll be able to track him leaving so we're dependent on the paps seeing the plane leave