Here's the full text of the exchange between Johnson and Tory MP Phillip Davis:

Davis: Given that Donald Trump is the democratically elected president of our closest ally and our single biggest trading partner who is carrying out a promise that he made to the American people in their general presidential election, I commend the foreign secretary for standing firm on the state visit, which is absolutely in our national interest. After all, if pursuing policies that the UK government did not agree with or pursuing policies in a ham-fisted manner barred any country from a state visit, no country would ever get a state visit.


Johnson: I am very grateful to my honorable friend. To the best of my knowledge, both Nicolae Ceausescu and Robert Mugabe have been entertained by Her Majesty the Queen, and I think most Members would concede that it is our duty and the right thing to do to make preparations now for receiving our friend, our partner, the leader of a long-established great democracy and our most important ally.