The Conservative Party co-chairman Baroness Warsi has apologised for failing to disclose her shared business interest with a relative who travelled with her to Pakistan on an official visit.
The trip, in July 2010 soon after she was appointed a Minister, was designed to "capitalise on the interest and goodwill" that her appointment generated.
Baroness Warsi did not disclose the fact that she had a shared business relationship with Mr Abid Hussain, a relative and community activist who accompanied her during the trip.
Here is the full text of the letter she wrote to the Prime Minister:
Here is David Cameron's response to her letter, in full: