Oxford's 250-year record of weather and climate

The Radcliffe Observatory in Oxford holds the record for the longest, continuous, single-site series of weather observations in the British Isles. Even today, in the age of satellites and automation, its meteorological instruments are read off by eye - by doctoral students from the university's School of Geography and the Environment. Stephen Burt, with colleague Tim Burt, has just published a book on the history of the Radcliffe record. Stephen spoke with our science correspondent Jonathan Amos.