Calor Gas - Calor began operating in Britain in 1935 with the aim of bringing clean, efficient and modern energy to rural homes and businesses across the country. 2015 marked the Company’s 80th year as it continues to play a vital role in meeting rural energy requirements; supplying bulk and bottled LPG (Liquefied Petroleum Gas) to customers across Britain, 365 days a year. Calor is the UK's  leading supplier of LPG and it does more than three quarters of its business in the countryside and so has a deep interest in rural issues.