Anders Vistisen, of the Danish People's Party, said trying to punish the UK for exiting the bloc could jeopardise the “special relationship” between Britain and the rest of Europe.
Especially on security issues, the MEP urged Brussels to see sense and reconsider using Brexit as an excuse to push for a common EU army.
Speaking exclusively to Express.co.uk, Mr Vistisen said: “Especially on the security front I think we are jeopardising a very special relationship with the Britain.
“Britain is the biggest security guarantor in Europe and Britain and America have been the transatlantic link in Nato.
EXPRESS • GETTY
Brexit should not be used to push the agenda for an EU army, Anders Vistisen said
“All these ideas of a common European army is to a certain extent a very bad reaction to Brexit.”
The Danish MEP said there was a growing concern leaders in Brussels could scupper negotiations with Theresa May to further its own agenda.
“From central Europe to Scandinavia – we like our… good relations with Britain in regards to security,” he said.
“We like our good relations with the Americans so we are very afraid of a European army being pushed in the aftermaths of Brexit.
It is a very bad signal to send to our Nato allies
“I think it would be a very damaging situation when we have a very unstable situation in the middle east, a very aggressive Russia on our frontiers.
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“It is a very bad signal to send to our Nato allies, and more importantly our allies in the UK, Canada and US, but also countries such as Norway who are in Nato but outside the EU.”
On Monday, former European Union president Martin Schulz, who is aiming to replace Angela Merkel as German Chancellor, refused to commit to Nato spending targets.
The potential Social Democratic Party candidate raised suspicions the bloc could be once again trying to form its own army and defence network between member states.
In pictures: Theresa May meets with EU's Tusk
Thu, April 6, 2017
The two leaders held talks on Brexit negotiations
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European Council President Donald Tusk gestures to members of the media as he leaves 10 Downing street after talks with British Prime Minister Theresa May in central London
Mr Schulz said: “Of course, we are a strong and reliable Nato member. However, I’m not of the opinion that Nato member states have agreed to achieve this goal of spending two per cent of their GDP for defence.
“This would mean a substantial financial burden for Germany. If I interpret this correctly, what was said is that this goal is something to strive for. €20billion or more in additional defence expenditures would certainly not be a goal more government would pursue.
“It doesn’t seem to me to be the highest priority of German foreign policy to spend 20 billion or even more every year in order to achieve this goal and in the end to have a policy where, in the middle of Europe, there is an army to the teeth.
“What we need is not an upward spiral in armaments but rather disarmament activities.”
In addition to warning Brussels against pushing for an EU army, Mr Vistisen also argued if the bloc decided to adopt a hard-line approach with Britain it could drive other member states to leave Brussels too.
Adding any punishment aimed at the UK would affect Ireland, which is also an EU member, he said: “From a Danish point of view, we would lose one of our biggest trading parties, same thing for Germany, same thing for the Netherlands and Belgium. Especially Ireland I think will be a moderating factor here because every time you punish Britain, you punish Ireland also.”
“Ireland is still a member of the European Union and when people think twice about this they’ll [realise] it would not be very wise to push Ireland towards also leaving the European Union.
“I don’t think it’s realistic we are going to give [the UK] such a bad deal but I’m saying that would be the consequence. If you really want to punish Britain on trade then [Ireland leaving] would be the consequence.”