This photo, according to a document from the government Norfolk County, UK, is a photo of the city of Norwich taking delivery of its first computer. It's an Elliott 405, a computer manufactured by Elliott Brothers, a now-defunct British company.
This 1957 article from The New Scientist describes it as the first municipal computer in the UK. The author, J.W. Cox, is an employee of Elliott Brothers. He states that the 405 was "specially designed for accounting and statistical purposes." It stores data on up to 1,000 feet of magnetic film.
Programming tip: lift with your legs, not your back.
-via David Thompson