Andy Burnham has affirmed that the United States will continue to be Britain's "most important ally," seeking to reassure on the future of the Special Relationship amid concerns about his approach to President Donald Trump. Burnham, set to become the United Kingdom's next Prime Minister, stated that this alliance remains "critical."

President Trump has previously acknowledged limited knowledge of Burnham, describing him as "extremely liberal." In 2017, Burnham declared he would refuse to meet Trump as a matter of principle, citing Trump's sharing of "hateful extremist material." The new premier faces potential flashpoints, including threatened U.S. tariffs over digital tax plans and existing tensions regarding Iran and NATO.

In an article for The Times, Burnham emphasized a desire for "stability where it matters most." He reiterated commitments to NATO and the UK's nuclear deterrent, stating, "Our relationship with the US will remain critical as our most important defence and security ally." He also pledged that "Britain's support for Ukraine will not waver."

Despite objections from the U.S., Burnham indicated that Jonathan Powell, a proponent of the Chagos "surrender" deal, will remain as No. 10's national security adviser.

Burnham lent his support to Keir Starmer's defense investment plan, a £15 billion boost over four years, though he did not provide a funding source or a specific timeline for increasing military spending to 3% of GDP, a goal pushed by Trump for NATO members by 2035.

He outlined a vision for defense investment to "back British workers and businesses," aiming to "generate economic growth in communities that have seen opportunities drain away." This strategy includes bolstering "sovereign capabilities" in areas like shipbuilding, energetics, AI, and quantum technology, while reducing foreign dependency and securing inward investment. "Reindustrialisation through defence - and other sectors - is critical for both our economic and national security," Burnham stated.

Burnham also signaled a move towards closer ties with the European Union, advocating for work within "European-led groupings" such as the E3 (France and Germany). He stressed the importance of "consolidating the progress made on UK-EU negotiations and make further progress quickly," focusing on cooperation in areas including illegal migration, economic security, and resilience against threats like terrorism and AI-driven disinformation. He indicated no change to the stance on the European Human Rights Convention, stating that support for international law and institutions "extends UK influence."