The five women of the ‘knit and natter’ group settle into chairs in a horseshoe shape. It is a warm summer evening, and in the small classroom the windows and doors are open and a cool breeze blows in through the trees outside. Maggie is still standing and offers to make Richard a cup of tea, poking in the cupboards in the small kitchen area at the back of the room. There’s lots of cooing and giggling as the ladies in the group take in their surroundings, admiring the children’s drawing of plants and animals, a few taxidermy wildfowl and a little ‘nature scene’ created from felt and pipe-cleaners. We are in the East Reservoir centre of the London Wildlife Trust (LWT), and the aptly named Richard Van Neste is preparing to talk to the group about the impacts of climate change on the local area.