Mr Johnson said: "The placing of challenging artwork amidst the historic surroundings of Trafalgar Square creates a delicious juxtaposition that gets people talking and debating, underpinning London's reputation as a great world city for culture".
There is little doubt that the NHS is under unsustainable pressure and, in a general election year, we need a serious debate, underpinned by the need for healthcare to be free at the point of use, about how we meet the challenges we are facing.
So the debate underpinning the row over Birmingham's schools isn't new.
Just listen to Hope Shand, research director at ETC: "There needs to be a wide societal debate informing and underpinning government decisions, and this can't be confined to technical issues alone.
Underpinning this debate, as ever with Muslim minority debates, is the problem of integration, and how accommodating certain religious considerations enables and fortifies an isolationist attitude.
In a foreword to the book, Journeys in Grace and Truth, another evangelical bishop, Colin Fletcher, says: "There are an increasing number of evangelicals who... are looking afresh at the scriptures underpinning these debates, and particularly at the New Testament texts, and who are reaching different conclusions from the traditional interpretations of the past".
And this seems a big part of the problem underpinning the debate: that we have lives.
With little on the economic calendar, the attention turned to Washington and the political struggles underpinning the debate over monetary policy.
Underpinning the debate about b-mab's effectiveness is a question: whether the theory behind the drug is true.
19 Potentially, under-recording could also affect the estimation of harm reduction; although this is less clear because there is debate on whether surveys underpinning the risk function literature measure exposure to alcohol in a way that is consistent with our surveys or otherwise.
