An investigation has been launched after security guards foiled a plot to embarrass the prime minister by playing "sex noises" from a phone hidden in the Commons.

Parliamentary staff carrying out a routine sweep of the chamber ahead of PMQs uncovered the mobile phone, which had been taped to the underside of the Commons table, Sky News understands.

It appears that the device had been set to play a sexually explicit recording if rung, and that the person behind the plot hoped to make this happen as Sir Keir Starmer faced off against Kemi Badenoch on Wednesday lunchtime.

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But, a Commons source has told Sky News, that parliamentary security guards found the device before it could go off.

The source explained that the phone had been attached to the underside

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