Pop-up vaccine centres are coming to London parks in time for the sun this weekend whatsapp Pop-up clinics, where you can turn up without a booked appointment, will be running in Greenwich Park, Wandsworth Common and Weavers Fields Park in Bethnal Green. (Photo by Christopher Furlong/Getty Images) In the latest iteration of the government’s “grab a jab” mass vaccination drive in the capital, several parks around the city will play host to pop-up clinics this weekend. It’s the final push for the NHS vaccination programme to maximise the jab rollout before the majority of coronavirus restrictions are lifted on Monday.