During lockdown many Britons turned to gardening with new-found – or renewed – enthusiasm. Now that coronavirus restrictions are easing in the UK, celebrity gardener and patron of the charity Send a Cow, Toby Buckland, is encouraging us to pay back what we’ve gained from our green spaces this past year – by helping people in Africa who are still at risk in the pandemic, and who are also on the frontline of the climate crisis.   He’s suggesting sponsored garden campouts and other fundraising activities in our back or front gardens, or…