Roman teams began Hadrian’s Wall in AD122. 1900 years later, British Archaeology celebrates the coalminers, gardeners and brickmakers who, a century ago, excavated the nearby Roman town at Corbridge. David Attenborough showed us Neanderthals hunting mammoths in Gloucestershire in a popular BBC film, but what does the archaeology actually tell us? We have an exclusive report on the dig. The study of ancient interest in the skies has had a long and bumpy history: as the solstice approaches, we review the field of archaeoastronomy. And in Westminster we look at the surprising archaeology and history of the prime minister’s residence.