Suella Braverman has admitted to sending government emails to her personal phone.
The Home Secretary apologised for the breach in a letter to Dame Diana Johnson, the chairman of the home affairs select committee.
The full letter relates to issues around her resignation on October 19.
Braverman resigned after she sent a draft written ministerial statement to the employee of a backbench MP.
She was forced to leave office by Liz Truss after the leak came to light, before being reappointed by Rishi Sunak six days later.