In his speech launching the initiative, Harry said: “I’ve learned that we cannot dismiss the idea of trying to do something, just because we can’t do everything.

“We can all do better. And while no one is perfect, we are all responsible for our own individual impact; the question is what we do to balance it out.”

However, it appears a favourite “sustainable” brand of Meghan Markle’s has been ranked poorly in terms of its eco-friendly credentials. The Duchess has worn US brand Everlane on a number of occasions.

This includes her debut with Prince Harry as an official couple, at the 2017 Invictus Games in Toronto, Canada.

For the occasion Meghan wore Everlane’s “Day Market Tote”, which costs £140 from the brand.

READ MORE: Meghan Markle shock: How Duchess showed ‘passionate’ side that ‘likes expensive things’