WASHINGTON — US Trade Representative Robert Lighthizer will meet with Britain’s trade minister Liz Truss this week, British government officials said on Tuesday, as the two allies gear up for post-Brexit trade talks that could prove contentious.

Lighthizer's trip to Britain will also include a speaking engagement at the Oxford Union on March 2

Lighthizer's trip to Britain will also include a speaking engagement at the Oxford Union on March 2. His meeting with Truss was confirmed by a spokeswoman at the British embassy in Washington. A USTR spokesman did not respond to a query about Lighthizer's British itinerary.

Truss has said that Britain would seek far-reaching reductions in US tariffs in trade talks that would run alongside negotiations over its future relationship with the European Union.

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But the British government has yet to publish formal negotiating objectives for talks with Washington, a move that trade experts say could come soon. Prime Minister Boris Johnson’s cabinet has agreed negotiating objectives for the EU final divorce talks and is set to publish them on Thursday.

Some US officials, including Treasury Secretary Steven Mnuchin, have said that a bilateral trade deal with Britain is the top US trade priority now that China and the United States are implementing a ‘Phase 1’ trade pact and the US Congress has approved the new US-Mexico-Canada Agreement covering US$1.2 trillion in North American trade.

While officials on both sides are hoping for an agreement before the US presidential election in November, the talks will be taking place as the United States negotiates separately with the EU on trade.

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Looming over the UK negotiations will be US President Donald Trump’s threat to impose 25 percent tariffs on imported cars, which would hit British-made Jaguars, Land Rovers (TAMO.NS), Minis (BMWG.DE) and other makes.

The United States is expected to face fierce resistance in Britain to US-grown genetically modified crops and meat treated with hormones and antibacterial washes.