Today the Shadow Chancellor has written to Philip Hammond calling on him to make public the cost of any secret deals he has made with the DUP in order to prop up the Government in parliament.
Please find below the text of the letter sent today by John McDonnell to Philip Hammond:
I am writing to seek information on a specific element of the deal being discussed between the Prime Minister and representatives of the Democratic Unionist Party, which has emerged in the press.
It is reported that the DUP is seeking the ending of Air Passenger Duty levied on passengers at airports in Northern Ireland.
HMRC estimated the total revenue from APD in Northern Ireland in 2015/16 to be in the region of £90 million.
This figure is an estimate and may need adjustment to take into account further devolved matters.
However a revenue stream of this scale is significant and would pay for the equivalent of, for example, an additional 2000 firefighters.
I am writing to ask whether the Government has been asked for this measure by the DUP, has agreed to it or is considering it.
In the interest of basic openness and transparency in government I am writing to ask that you publish any financial measures that have been discussed with the DUP and set out the financial implications of any measures agreed with this party.
I look forward to a prompt response given the considerable public interest in this matter and its consequences on our public finances.
John McDonnell MP