The Scarborough-based company launched the scheme in 2006 in a bid to offset its carbon production. It covers all areas of the business and the first five years have been collated from January 2007 to December 2011.

Results include a gas usage reduction of 44%, electricity usage reduction of 27%, a water usage reduction of 28%, a 37% drop in the amount of A4 paper purchased, a 50% reduction in cardboard boxes purchased and a 75% cut in the number of skips sent to landfill.

Duraweld environmental co-ordinator Victoria Pitts said: "Since the scheme's launch in 2006, we have made fantastic progress with our environmental management programme and I am delighted with the results.

"Our leap of 11 places up the Sunday Times Best Green Company list in 2011, from 39 to 28, has also been a remarkable achievement in the last 12 months, as has the fact that we were mentioned in the Prince’s Mayday Network Annual Report in our first year of membership."