Concerns are growing in the UK over plans for a vast new Chinese embassy in London, amid warnings it could become a major hub for espionage across Europe. Unredacted planning documents reveal a concealed underground chamber positioned close to fibre-optic cables carrying sensitive financial and internet data for the City of London and Canary Wharf. Security experts say the scale of the underground facilities raises serious questions about potential intelligence-gathering activities. The proposed embassy, near the Tower of London, would be China’s largest diplomatic outpost in Europe. MPs, former intelligence officials, and international partners have urged the Government to block the development, citing China’s designation as a hostile state in multiple security briefings. Despite assurances that national security concerns have been assessed, critics argue the risks remain unacceptable. The debate highlights the need to safeguard critical infrastructure, sovereignty, and democratic freedoms in an increasingly contested global environment.