when did uk change from imperial to metric
Metrication in the United Kingdom Work on adapting specifications started almost as soon as the government first gave its approval in 1965. The BSI took the lead in coordinating the efforts of industry, and where appropriate working with the International Organisation for Standardisation (ISO), CEE, CEN and CENELEC[36][37] while the Royal Society liaised with professional societies, schools and the like.[38] Initially the BSI targeted 1200 basic standards which were converted to metric units by 1970. Most of the remaining 4000 standards were converted in the ensuing five years.[39]