Chugalug the thing to remember is
BREAKING NEWS | A source has told me that the MoD has accepted a joint bid from
Raytheon USA/Bombardier to make Sentinel aircraft flyable to be flown to the United States with the rumour that the end customer for the aircraft will be the U.S. Army.
These are the manufacturers of both items, the systems and the aircraft, as such they could just as easily put them on the USA register and fly them under test conditions, you have to remember before an aircraft is issued with a type certifcate or certificate of airworthiness the manufacturer flies the aircraft and tests it, once deemed acceptable they are issued, Indeed when a manufacturer tests new equipment on an aircraft such as engines it is no longer complying with they type cert or is "airworthy" as it no longer meets the requirements of the CofA. Strange as this may seem I know of one test aircraft that was used by a manufacturer before it was sold with a CofA and it is sold with 0 hours, even though in a test life it may have done hundreds.
Looking for the latest version on LaLa Land is a pain, so this is the UK version for anything that "we used" to build
https://publicapps.caa.co.uk/docs/33...2014_print.pdf