The two sides have now agreed to postpone meetings, due to take place in Boston, until next spring due to concerns over the coronavirus pandemic.
Talks were also hit by delays due to US tariffs on UK products entering America, in particular on whiskey.
With the November election fast approaching, negotiations have also been stalled due to the prospect of Democrat Joe Biden taking over from Donald Trump.
Although Mr Trump has been a staunch supporter of the UK’s exit from the EU, his rival’s position is not yet completely known.
He was, however, Vice President in Barack Obama’s administration who stated the UK would not see preferential trade terms with the US post Brexit.
Although the two sides have agreed to continue talks throughout the autumn, the delay represents a major blow to International Trade Secretary, Liz Truss’ hopes of a quick deal.
More to follow…