upstream

Circuit Court of Appeals last year that said the board had failed to consider the “upstream and downstream” impacts on the environment.

The home secretary will instead claim that focused on what is described as the ‘upstream problem’ – where smuggling gangs initially recruit people to make the long journeys to the West – is key.

The downstream station had been deactivated for many years and the upstream station was still active.

Aramco did not comment on the letter when contacted by BBC Sport but has previously said it has "one of the lowest upstream carbon footprints in the industry".

Biologists from the California Department of Fish and Wildlife have spotted fall-run Chinook salmon in tributaries miles upstream from where Iron Gate Dam was removed.