I am surprised this is NOT illegal in the UK as this a clear case of espionage to utilize human knowledge to learn about western aircraft and the strategies the fighter pilots use in a war effort. Its really crazy to see how in capitalist societies we see there is a price for everything and the Chinese and other Western countries adversaries (Russia, IRAN, China etc...) exploits this by offering money for influence and knowledge. This loophole in the UK law needs to be closed ASAP and charge anyone who shares military secrets whether current or retired military personal with the enemy should be charged with treason!
www.theguardian.com
China has recruited dozens of former British military pilots to teach the Chinese armed forces how to defeat western warplanes and helicopters in a "threat to UK interests", officials have revealed.
One official said some 30 mainly ex-fast jet but also some helicopter pilots - lured by annual salaries of around £240,000 - are currently in China training pilots for the People's Liberation Army, in what a defence analyst described as a stunning breach of security.
A retired senior Royal Air Force officer said: "Wow… that is appalling. What were they thinking?"
Beijing is actively trying to hire many more serving and former military pilots and other specialists from across the RAF, the Royal Navy and the British Army as well as personnel from other western nations, the western official said.
The situation is so grave, the Ministry of Defense's Defense Intelligence service on Tuesday issued a "threat alert" to warn serving and former military personnel against such approaches.
China is using third-party head-hunters, including a company based in South Africa, to target personnel, the western official said.
The official named the company as the Test Flying Academy of South Africa, though stressed it had no connection with the South African government.

UK to issue ‘threat alert’ over China’s attempts to recruit RAF pilots
Former and serving pilots told not to disclose sensitive information, in attempt to ‘mitigate risk’ of schemes