Nick Dearden, director of the anti-poverty campaign group Global Justice Now, added that critics plan to "welcome" the U.S. president "in the traditional manner" after Starmer presented Trump with an official invitation from King Charles.
Starmer invited the president during his first meeting at the White House since Trump was elected to serve a second term in November, which came as a bipartisan group of U.S. lawmakers introduced legislation to authorize comprehensive trade talks between the two countries regarding "tariff and nontariff barriers affecting any industry, product, or service sector."
Ahead of the meeting, Starmer told reporters that his message to Trump would be "really simple, that there is no more important relationship for the United Kingdom [than the U.S.], in defense, in security, in trade, in tech, in finance, and so much more."
"We are reforming permitting, getting things built, reducing barriers to investment and growth. And we're open for business, open for investment, and we're determined to help U.S. innovators thrive in the United Kingdom," said Starmer. "So my message is we want to work with you, we want to welcome you to Britain, we want a new partnership, because our history shows that when we work together, great things happen."
The comments were indicative of Starmer's push for cooperation with the U.S. on artificial intelligence and other "advanced technologies," which the new British ambassador to the U.S., Peter Mandelson, has dubbed a plan to "Make Our Economies Great Again," or MEGA.
Dearden called the proposal "cringeworthy" ahead of Starmer's meeting.
"We need to stop this," he said. "A tech trade deal with Trump would roll out the red carpet to tech billionaire oligarchy."
Global Justice Now earlier this month denounced Starmer and Trump for refusing to join 60 international signatories in supporting a declaration backing "inclusive and sustainable" AI at a summit in Paris, with U.S. Vice President JD Vance saying the Trump administration objected to "excessive regulation" of technology and critics suggesting the U.K. Labour government was attempting to curry favor with Trump.
Dearden said last week that any trade negotiations with the U.S. were likely to see Trump "pushing the demands of Big Tech oligarchs who want to avoid tax and regulation in the U.K."
"People in the U.K. don't want to see a wrecking ball taken to our regulations, standards, and public services, especially when we'e talking about new technologies like AI where we're only just beginning to get to grips with the dangers," said Dearden.
The U.K. is pushing to avoid the tariffs Trump has threatened for Canadian, Mexican, and E.U. imports. Trump said earlier this month that he believed differences with the U.K. on trade "can be worked out." He said Thursday that the tariffs targeting Canada and Mexico are set to take effect next week.
Dearden warned last week that with trade talks taking place behind closed doors, "tech titans" will be empowered "to make their demands away from the public gaze."
"Any potential for a Trump trade deal," he said, "must be taken off the table immediately."