One global trade expert told the BBC that the agreement is "unprecedented".

If approved by the energy watchdog Ofgem, it would allow the US firm to take on the UK's dominant suppliers.

He has apologised over the Oaxaca Slip-on, inspired by sandals made by Indigenous artisans, after criticism from Mexico.

Zara, M&S and Next had ads banned over models that look "unhealthily thin" - is size zero making a comeback

The world's best-selling van has been in production since 1965.