It is understood not to want to set a precedent by treating an worldwide body in the same way as a nation state. This negotiating failure will tip many performers over the edge."The UK government has confirmed that it will not pursue the "musicians' passport" idea endorsed by the Musicians' Union, but aimed to "facilitate" EU touring by working with EU member states to make life easier for those working in the creative industries in their respective countries".
Michel Barnier, who led the EU's negotiating team during Brexit talks, said the United Kingdom should be "very careful" about its approach.
"They have to be very careful", Barnier said, adding: "I know that once again it can not be business as usual. but we are not an worldwide organization like the others. But we've all got a bit of breathing space to work it out, as there's very little happening at the moment, and I don't see touring returning to Europe until the fourth quarter".
Tobias Ellwood, a lawmaker with the governing Conservative Party who heads Parliament's Foreign Affairs Committee, said the government was being "petty".
"Biden commits to strengthening alliances and we engage in silly spats which will not help strengthen security and trade cooperation".
"We are better than this".
Sir David Lidington, who was effectively deputy prime minister under Theresa May, said he hoped the Foreign Office "doesn't pick a fight on this", warning that non-recognition could set a "bad precedent" for regimes that hate European Union ambassadors speaking up in support of human rights.
"It's a matter of fact that the European Union is a collective of nations, but it's not a state...in its own right", he said.
"Strange position for Brexiteers to take", he added.
The Vienna Convention grants diplomats immunity from detention, criminal jurisdiction and taxation. When I bring an American act over for a European tour, they will go to six or seven different countries, the office will send out a spreadsheet to promoters which breaks down all their passport information, and normally that's all they need.
"Nothing has changed since the UK's exit from the European Union to justify any change in stance on the UK's part", he said, adding that the EU is "not a typical worldwide organization".
The refusal to grant diplomatic status to the bloc's envoy would mean that de Almeida and his staff would not have the privileges and immunities afforded to diplomats under the Vienna Convention, or the opportunity to present his credentials to the Queen.