the senior— breach of the rules. and once the senior civil _ breach of the rules. and once the senior civil servant - breach of the rules. and once the senior civil servant sue i the senior civil servant sue gray's report had found a failure of leadership. i’m failure of leadership. i'm ha - failure of leadership. i'm happy to _ failure of leadership. i'm happy to say _ failure of leadership. i'm happy to say on - failure of leadership. i'm happy to say on the - failure of leadership. in happy to say on the record now that when i said, when it came to the south and said, in all sincerity, that the rules and guidance had been followed at all times, it is what are believed to be true. boris johnson _ believed to be true. boris johnson claims _ believed to be true. boris johnson claims he - believed to be true. boris johnson claims he relied l believed to be true. boris l johnson claims he relied on believed to be true. boris - johnson claims he relied on the johnson claims he relied on the advice of his a common question the methods of mps investigating him, and says he can't see why he received a fine. mps will later test that defence is they question a former prime minister on the saga that played a part in his downfall. jonathan blake, bbc news. we will have full coverage later today on bbc news when the proceedings get under in westminster. also do remember you can head to our website, bbc.com/news or the bbc news app. as you can see it has a lot more detailfor you on app. as you can see it has a lot more detail for you on the day that is ahead for the former prime minister and also