Is espionage immoral? The discovery of a Chinese spy at the very heart of British politics is causing consternationA feeling of shock or confusion. It derives from a Latin verb meaning to alarm or dismay.. But some say it is the price we must pay for global security.
Britain poised to unmask Chinese spy network

Glossary
Consternation - A feeling of shock or confusion. It derives from a Latin verb meaning to alarm or dismay.
Palace of Westminster - Where the UK's House of Commons and House of Lords meet.
Parliamentary aide - Assistants to officials and politicians in parliament.
Espionage - Spying.
Sun Tzu - A Chinese military general and philosopher who lived in the Eastern Zhou period.
Misinformation - Incorrect or misleading information unintentionally presented as fact. It can be contrasted with disinformation or deliberate lies.
Istanbul - A major city in Turkey, crossing both Europe and Asia.
Mary, Queen of Scots - The Queen of Scotland from 1542 to 1567. She was the cousin of Elizabeth I.
Infrastructure - The basic systems and services that a country needs to keep it going.
Kim Philby - A member of the Cambridge Five, a spy ring which gave British secrets to the Soviets during World War Two and parts of the Cold War.
USSR - The United Socialist Soviet Republic, the USA’s main rival in the Cold War before it collapsed and broke up into a number of smaller states in 1991.
Communist - An economic system entailing collective ownership of all means of production in contrast with capitalism, which holds that industry and businesses are controlled and run for profit by private owners rather than by the government.
Harold Wilson - The UK's Labour party prime minister from 1964 to 1970 and 1974 to 1976.