Tonight's statement will be the climax so far of a long Westminster career for Dominic Cummings - whose time in power has been dogged by outrage and scandal.
Privately educated in Durham, he graduated from Oxford University in 1994 and briefly moved to Russia, before moving back to the UK to campaign against joining the Euro.
In 2007 he started working for Michael Gove - where as special advisor he was branded a "career psychopath" by David Cameron.
He and Mr Gove took on teachers and unions, which Mr Cummings branded "the blob". And the pair were accused of trying to use private email addresses to avoid disclosing communications under the Freedom of Information Act.