Cabinet Office minister Oliver Letwin, a key architect of the coalition, insists the arrangement remains strong, in an interview with the Guardian:
"It will be concerned with elaborating, refining and improving the first wave. We do need to return to the question of how we deal with the evolution and deepening of our policies in the last couple of years of parliament.
"We are beginning to talk about that collectively in government.
"There are very strong bonds now. We have come to trust one another.
"If you want to make the kind of changes that we are talking about and begin to see the results within the five year allotted period, you need to begin at the beginning. These things take time.
"Will the Conservatives or will the Liberal Democrats benefit ? The answer is both. We're both going to be judged by the same standards at the end."