Russia sees the UK as one of its “top targets” in the West, according to the Intelligence and Security Committee.
The ISC’s long-awaited report said the UK was targeted due to its close relationship with the US and because it is “seen as central to the Western anti-Russian lobby”.
Its inquiry covers disinformation campaigns, cyber tactics and Russian expatriates in the UK.
But much of the “highly sensitive” detail will not be published.
No 10 was accused of delaying its release ahead of December’s UK election – which it has denied.
Speaking at a press conference to launch the report, one of the ISC’s committee members, Kevan Jones, criticised the prime minister for not signing it off sooner, saying there was “no reason for delay”.