The host of Lorraine told the US businesswoman that she ‘didn’t answer any of the questions’ that were put to her.
The businesswoman has made a series of claims about the prime minister, claims dismissed as "vexatious" by the Conservative Party.
The government report comes after Ms Arcuri denied reports she received favouritism during Boris Johnson's time as London mayor.
Members of the London Assembly oversight committee were due to start an inquiry.
The London Assembly Oversight Committee said the "already serious situation has now become grave" before the prime minister had responded.
The spotlight on diplomatic immunity for American woman Anne Sacoolas heads a mixed bag of front page stories on Tuesday.
The US businesswoman confirmed that the then London mayor was a regular visitor to her flat but insisted she received no favouritism.
Jennifer Arcuri says she is suffering ‘collateral’ damage over claims she had an affair.