While British military personnel frequently take part in training exercises with foreign armies, any collusion by ex-pilots with China -- which London has dubbed the "number one threat" to domestic and global security -- poses a serious concern.

"We are taking decisive steps to stop Chinese recruitment schemes attempting to headhunt serving and former UK Armed Forces pilots to train People's Liberation Army personnel," a spokesperson for the British defence ministry told AFP.

UK media said that over 30 ex-pilots had accepted offers upwards of pound240,000 ($273,750) with many of those recruited in their 50s and having recently left the British airforce.

The practice has been going on since 2019 but has been stepped up recently, the reports said.

Britain's defence ministry said it was "reviewing the use of confidentiality contracts and non-disclosure agreements", adding that all serving and former personnel are subject to the Official Secrets Act, which prohibits UK public servants from sharing state secrets with foreign powers.

"The new National Security Bill will create additional tools to tackle contemporary security challenges - including this one," the spokesperson added.

China's Ministry of National Defense did not respond to calls requesting comment from AFP.

Relations between London and Beijing have soured following China's crackdown in former UK colony Hong Kong and disputes over technology giant Huawei's involvement in the roll-out of Britain's 5G network, as well as concerns about human rights and influence peddling.

In a speech in London this month, the director of Britain's GCHQ spy agency Jeremy Fleming warned China's growing technological dominance "is an increasingly urgent problem" for Western countries, urging them to act to defend their values and influence.

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