"Clearly what was happening was the commission was trying to bully the British people - and the British people will not be bullied, and the government will not allow them to be bullied", Davis said.
Discretion, moderation, mutual respect and a maximum of good will were required to succeed, said Tusk, a former Polish prime minister who will play an important role in the negotiations. Drawing applause and laughs he continued: "And then the French will have elections next Sunday and I would like them to understand what I'm saying about Europe and nations".
"I will not discuss our future relationship with the United Kingdom until the 27 member states are reassured that all citizens will be treated properly and humanely", he said.
The Secretary of State for Exiting the EU said the European Commission is trying to "bully the British people" and said the leaking the German press was "deliberately misleading." "These negative consequences simply follow logically from the choice made by the British people". It is no small event.
"We will negotiate with our British friends in full transparency, but there should be no doubt whatsoever - it isn't the European Union which is abandoning the UK".
Juncker speaks a number of European languages fluently but regularly speaks English at worldwide gatherings. "I don't think there is any question of influencing the campaign". She said Germany would push to "create clarity and planning security as quickly as possible" for European Union residents in Britain, who include about 100,000 Germans.
He supported May's belligerent rhetoric too, saying the PM "was right to point out to everybody that these negotiations are going to be not just hard, but extremely tough, and to rightly point out how they are going to be dealt with". According to her, bureaucrats of Brussels were acting in a coordinated fashion to affect the result of the election.
In a sign of growing friction and frustration, Mrs May accused European Union politicians and officials on Wednesday of seeking to sway the outcome of a the general election on 8 June by issuing threats over Brexit.
An EU source told AFP this was "obviously a message applying to both sides" after days of damaging rows before the two-year Brexit talks have even formally got underway. "No one wants to interfere in the election of the U.K", he said.
"The displays that we've seen over the last 48 hours have been very worrying, suggesting quite an unstable approach taken by the prime minister", she said.
"You need to address the material issues, financial, who gets the kids, transitional measures", he said.
"In a nutshell we are very busy and we will not "Brexitise" our work". "And that's why I am optimistic as to the outcome".
Theresa May faced her first nationwide electoral test as Britain's Prime Minister on Thursday, as she toughened her Brexit position just weeks before a crucial general election.
"Well, that is not true".