President Donald Trump greets Britain`s Prime Minister Keir Starmer during a summit on Gaza in Sharm el-Sheikh on Oct. 13, 2025.Evan Vucci/Pool/AFP via Getty Images

British Prime Minister Keir Starmer said Monday that U.S. President Donald Trump`s threat of tariffs against allies over Greenland is "completely wrong" and a trade war is in no one`s interest.

Trump said Saturday that he would charge a 10% import tax starting in February on goods from eight European nations, including the U.K., because of their opposition to American control of Greenland, setting up a potentially dangerous test of U.S. partnerships in Europe. Greenland is a semiautonomous territory of NATO ally Denmark.

The president indicated the tariffs were retaliation for last week`s deployment of symbolic numbers of troops from the European countries to Greenland, which he has said was essential for the "Golden Dome" missile defense system for the U.S. He also has argued that Russia and China might try to take over the island.

Starmer said Britain supports the "fundamental right" of Greenland and Denmark to decide the future of the Arctic island.

Starmer, who has worked to forge a strong relationship with Trump, said the U.K.-U.S. relationship was vital and "we are determined to keep that relationship strong, constructive and focused on results." But he said that doesn`t mean pretending differences don`t exist.

He said at a news conference in London that "being pragmatic does not mean being passive and partnership does not mean abandoning principles." But seeking to calm the turmoil, Starmer said Britain will work with allies in Europe, NATO and the United States and "keep dialogue open."

He indicated that Britain is not planning to consider retaliatory tariffs. "We have not got to that stage. My focus is on making sure we don`t get to that stage," he said.

Six of the eight countries targeted are part of the 27-member European Union, which operates as a single economic zone in terms of trade.

European Council President Antonio Costa said Sunday that the bloc`s leaders expressed "readiness to defend ourselves against any form of coercion." He is expected to convene a summit of the bloc`s leaders later this week.

Denmark`s defense minister and Greenland`s foreign minister are expected Monday to meet NATO Secretary-General Mark Rutte in Brussels, a meeting that was planned before the latest escalation.

In a statement beforehand, Danish Defense Minister Troels Lund Poulsen said Denmark and Greenland were "meeting broad support for NATO to do more in the Arctic" and would discuss that with Rutte.