Trying to recollect which fighter the UK make alone, pretty sure none. Not discounting technical knowledge in aviation just UK is dependant heavily on others.
The Typhoon, and the assistance from the European partners was average at best. The design, all crucial power plant etc all British.
When the indians get the French and US to design the tejas for them, it's called "consultancy", but when PAF does it with a Chinese design it's called "copying" ...and now they'll need the British to help them with their fifth gen. These begharat slime are so petty minded.