The TV presenter’s message connected with Ms Mercer so much that was moved to make a “mini-speech” about it in one of her classes.
She said she told her fellow pupils: “If you have like five bucks to spare you should put your money towards [it] because, at the end of the day, conservation in one part of the world will help everyone.”
The 15-sq-mile (38.8-sq-km) Rothbury Estate is the largest area of land to be put on sale in England in decades.
The charities have said they plan to boost wildlife, restore bogs and promote nature-friendly farming on the site.
