has warned the to back down from its threat to block vaccines to the because the firm “heavily” depends on the country for vital ingredients.It comes after the EU’s chief, , said she would halt the export of vaccines into Britain. She criticised on Wednesday for having “underproduced and underdelivered” to the bloc and said the EU will consider halting exports to countries with higher coverage rates than its own.But Pfizer and its partner, BioNTech, have told Brussels that the UK has the power to retaliate by withholding raw and crucial materials needed for its jab, the A...…has warned the to back down from its threat to block vaccines to the because the firm “heavily” depends on the country for vital ingredients.It comes after the EU’s chief, , said she would halt the export of vaccines into Britain. She criticised on Wednesday for having “underproduced and underdelivered” to the bloc and said the EU will consider halting exports to countries with higher coverage rates than its own.But Pfizer and its partner, BioNTech, have told Brussels that the UK has the power to retaliate by withholding raw and crucial materials needed for its jab, the A...WW…