US President Donald Trump will not make a formal trip to the UK until 2018, government sources indicated and American officials later confirmed.
A White House official told Reuters scheduling clashes between the two leaders has meant a meet-up in 2017 was near-impossible.
"Finding a date that works for everyone turned out to be difficult. We're looking at next year," they said.
Senior figures within Whitehall confirmed that the visit had been pushed back late last night, Politics Home reports, although it is thought a less formal visit could still take place this year "if he is in Europe on other business".
Trump was expected to make a state visit this summer, but it was cancelled amid fears of protests and following calls from several MPs and London mayor Sadiq Khan that he not be invited after a series of controversial measures including his travel ban and pulling out of the Paris accord. A series of protests were held earlier this year.
It was reported last month that the tycoon-turned-leader had asked for the visit to be put on hold over fears he would be met with widespread protests.