Britain's Healthiest Company winners revealed

The healthiest companies in Britain have been announced with Johnson & Johnson being named as the healthiest large company, Adidas UK the healthiest medium-sized company and Old Mutual as the healthiest small company.

The 2015 Britain’s Healthiest Company awards, launched in 2013, are based on Britain’s largest and most comprehensive annual workplace wellness survey and this year received over 32,500 employee responses from 112 companies, a three-fold increase in the number of participating companies since launch.

The survey was developed by Vitality, the company changing health and life insurance for good, and is conducted in partnership with Mercer, the global consulting leader in talent, health, retirement and investments.

Research and analysis for Britain’s Healthiest Company is undertaken by the University of Cambridge and RAND Europe, which collaborate on health research through the Cambridge Centre for Health Services Research.