Cummings tells MPs âWhen the public needed us most, the government failedâ Downing Street is braced for more explosive revelations The video will auto-play soon8Cancel Play now The Prime Ministerâs former chief advisor Dominic Cummings is making a much-anticipated appearance before MPs on Wednesday. Mr Cummings has been vocal in his condemnation of Boris Johnson, Health Secretary Matt Hancock, and others since leaving Government after a behind-the-scenes power struggle in November. Ahead of giving evidence to the Commons Health and Social Care and Science and Technology Committees, Mr Cummings set out his criticisms of the Governmentâs approach to the pandemic in a thread of messages on Twitter, claiming the original response to the coronavirus outbreak was to pursue a strategy of âherd immunityâ.