So after reading this it sounds like my 2020 Rocket 3 was built in Thailand. If that's the case then what the hell, they built a great bike!
"The move, announced to Triumph employees yesterday (February 20), will see the last remaining UK produced models – the Speed Triple and Tiger 1200 – join the rest of the range at the Chonburi, Thailand, production facilities. The net result for Hinckley is a reduction of around 2000 units per year, leaving only the high-end Triumph Factory Custom models and selected other special builds based on UK soil. The firm currently build around 65,000 bikes per year, with only 10% of that figure rolling out of the Hinckley facility."
Triumph invest in UK R&D as volume production moves to Thailand