Yesterday, Nigel Dodds, the deputy leader of the DUP, criticised the proposed withdrawal agreement.
Liberal Democrat leader Sir Vince Cable called on the government to protect security in Northern Ireland by ending the "brinksmanship" over a no-deal exit from the EU.
The PM is seeking further legal assurances from the European Union but it has said negotiations will not be re-opened.
Theresa May's hopes of winning key support for her Brexit deal appear to have suffered another blow after the DUP said its "principled objections" remain.
Mr Dodds said: "The Irish Republic's "no deal" preparations published just before Christmas have laid bare the nonsense propaganda about a hard border".
"EU spokespersons have gone out of their way to reiterate that there will be no renegotiation of the Withdrawal Agreement".
Officers will be pulled from their regular duties, with the extra back up needed due to equipment and tactics in Northern Ireland differing from those used in the rest of the UK.
"With this clarity emerging in London, Dublin and Brussels, there is evidently no need for the aspects of the Withdrawal Agreement, which have been so vigorously opposed by a broad cross-section of the House of Commons".
Heathrow suspends departures after drone spotted
The exclusion zone around airports will be extended to approximately a three-mile radius, with extensions from runway ends. Today, the British government announced a package of measures created to give police extra powers to combat drones .
According to a report in The Guardian, training for the selected police officers is set to begin later this month after senior figures in the Police Service of Northern Ireland (PSNI) requested reinforcements to help deal with any disorder that might arise in the event of a hard border being restored.
"Brussels must now demonstrate that if it truly cares about Northern Ireland, then erecting a new east-west barrier should be no more palatable than having any new north-south barriers", he added.
On Thursday, Irish Prime Minister Leo Varadkar said the border issue was the only "red line" his country has had in the Brexit negotiations and that would not change.
Varadkar's advisor is due to speak to one of May's advisors on Thursday he said.
The prime minister also defended herself against critics by asking them to provide an alternative to the plan she had negotiated.
Mr Wilson continued by saying that Northern Ireland farmers and businesses should be "totally relaxed" by the prospect of a no-deal Brexit.
After the Tories massively miscalculated their support in the 2017 General Election, which left them short of a majority in Parliament, the Conservatives went into a confidence and supply arrangement with the DUP.