May has pledged to overcome deep divisions in her cabinet of ministers at a meeting at her country residence this week and come up with a blueprint for the future relationship with the European Union, a step needed to move forward all-but-stalled Brexit talks.
The pound has been weighed down recently by a resurgent USA dollar, weakness in the economy and fears that Prime Minister Theresa May will run out of time to agree a deal with the European Union for life after Britain leaves the bloc next year.
But it is vital that Cabinet ministers do not fall into the trap of believing that what. "I am sure that she will deliver a Brexit that is entirely consistent with the promises she has made".
"But when an MP & his supporters have collected £750k to do just that, there is no doubt that Brexiteers are planning a coup".
Philip Hammond has called for the concerns of business to be taken seriously ahead of Friday's key Chequers Brexit summit.
In a further rebuke to Mr Johnson - who reportedly said "F*** business" when some firms began expressing worries about the progress of the Brexit negotiations - Mr Hague said the concerns of businesses such as Airbus and BMW "cannot be dismissed".
His intervention will be seen as a shot across the bows to senior ministers, such as Foreign Secretary Boris Johnson, who have reportedly been considering resigning if Theresa May gives too much ground to those pressing to keep Britain as close to the European Union as possible after Brexit, potentially triggering a leadership contest.
A government official said he would not comment on speculation before the meeting.
Mark Rutte has urged his British counterpart Theresa May to provide more clarity on Brexit with less than nine months to go until the United Kingdom leaves the European Union.
In Strasbourg, Mr Tusk told MEPs: "The sooner we get a precise United Kingdom proposal on the Irish border, the better the chance to finalise the Brexit negotiations this year".
"We are now looking forward to the White Paper from the United Kingdom, and we very much hope that it will bring the necessary clarity, realism, and impetus to these negotiations", Tusk told MEPs.