EU\, U.K. to Meet for Brexit Summit

EU, U.K. to Meet for Brexit Summit After Spain Secures Reassurances Over Gibraltar

U.K. gave written confirmation a future trade deal with the EU won’t automatically cover Gibraltar

BRUSSELS—A planned summit between European Union leaders and U.K. Prime Minister Theresa May is set to take place Sunday to endorse a negotiated Brexit deal, after Spain obtained extra guarantees over the status of Gibraltar.

European Council President Donald Tusk on Saturday sent an invitation letter to leaders saying that “the EU27 has passed the test of unity and solidarity.”

That...