It emerged Madame Tussauds had transported its waxwork model of Mr Trump four-and-a-half miles from its Marylebone site to the new embassy, in Nine Elms in Vauxhall.
An appearance from the man himself would have been unlikely, given that he had branded the embassy “off location” in a Tweet explaining his cancelled UK visit.
Sceptics claim the real reason is the prospect of large-scale demonstrations. Mr Trump’s proposed state visit next year, during which he will meet the Queen, is still on.
Staff from the Embassy, joined by construction workers, crowded around the model and posed for selfies.
Marsha De Cordova, Labour MP for Battersea, claimed Mr Trump had cancelled his visit because he is “scared” of peaceful demonstrators opposing his views.
She said: “We welcome the fact that Donald Trump isn’t coming to London next month and coming to Battersea to open the embassy.”
Ms De Cordova said his tweet blaming his predecessor Barack Obama for the embassy move was “pretty inaccurate”.
She said: “Trying to diss Battersea clearly indicates he’s never been here and doesn’t know anything about my constituency.
“We are 15 minutes away from the heart of Britain’s democracy – the Houses of Parliament and Westminster.”
Claire Treacy, from Madame Tussauds, said transporting the model Trump was not easy, though only the figure’s head and hands were made from heavyweight wax – and extended her own invitation to Mr Trump to pay a visit to the world-famous museum.
She said: “We’re all about famous fun at Madame Tussauds London and we’ve got such a great figure in our Trump.
“Mr Trump is always welcome to come and visit his figure here in the UK.”
Madame Tussauds is home to many other waxworks of world leaders, including Nelson Mandela, Theresa May and Mr Trump’s predecessor Barack Obama – although there is no room for his current nemesis, Kim Jong-Un.
More than 2.5million people visit the museum every year.