The government has estimated a post-Brexit trade deal with the United States would boost the UK economy by 0.16% over the next 15 years.
The figure is included in a 180-page document setting out the UK's negotiating position for talks, expected to begin later this month.
The document pledges to maintain maintain food standards and stresses that the NHS is "not on the table".
It comes as separate trade talks with the EU get under way in Brussels.
The UK government said a US deal should seek to lower import taxes, or tariffs, on many UK exports - and increase trade in services. https://www.bbc.co.uk/news/uk-politics-51706802
Governments own figures.