Come to Richmond then hike around Richmond park. There will be: deer 🦌 (no promises), hiking, and pleasant and interesting conversation about doing the most good with our time and resources (some promises).
We'll start at Richmond station at 13:00, hike through the park for around 10 km then finish in The Black Horse Pub in Norbiton (some time before 16:00). Bring fluids, warm clothes and sturdy footwear. It will be cold, muddy, and awesome.
Here's the prospective route:
Here is a model of the expected value of this hike: