The UK and US are set to sign an agreement focused on accelerating the development of nuclear power.
The agreement aims to generate thousands of jobs and strengthen Britain's energy security.
It is expected to be signed off during US President Donald Trump's state visit this week, with both sides hoping it will unlock billions in private investment.
However, the designs behind some of the deals are relatively new and it could take many years before the nuclear projects generate energy for homes and businesses.
The key focus of the so-called Atlantic Partnership for Advanced Nuclear Energy is to make it quicker for companies to build new nuclear power stations in both the UK and the US.
The hope is to halve the time it takes to gain regulatory approval for nuclear projects from up to four years to two.