“The sheer bonkers, unexpected brilliance, of a pink boat in Oxford Circus really made me think anything was possible,” says Sarah Lunnon, a former councillor, a co-ordinator in XR’s political circle and one of the “barnacles” who glued herself to the ship’s hull. She has spent the last months of lockdown working with the “Bill Alliance” (a consultation with eight university academics specialising in politics, sustainable development and climate change) trying to make a new parliamentary Bill watertight after the last ran aground. But while everything XR achieved, with limited resources in such a remarkably short space of time, was little short of astonishing, political momentum also started to run aground after last April’s activities. “A lot of the language we used looked good on a poster — but it looked extremist and alarmist to Parliament,” says Lunnon. “They had a point.”