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MI5 on Espionage

The UK is a high priority espionage target and a number of countries are actively seeking UK information and material to advance their own military, technological, political and economic programmes.

We (MI5) estimate that at least 20 foreign intelligence services are operating to some degree against UK interests. Of greatest concern are the Russians and Chinese.

The number of Russian intelligence officers in London has not fallen since Soviet times.

The threat against UK interests is not confined to the UK itself. A foreign intelligence service operates best in its own country and some may therefore find it easier to target UK interests at home, where they can control the environment and where we may let our guard drop.

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