Oil giant Shell UK has offered warning posters to managers at the firm's 2,500 stations after researchers found that phones can produce tiny sparks capable of causing fireballs.

James Smith retired from Shell in April 2011 after 7 years as Chairman of Shell UK.

Immediately, following the acquisition, 254 of these retail sites were sold to Shell UK for £240m.

Appointed chairman of Shell UK in 2004, Smith immediately recognised his tenure would be defined by his response to climate change.

John Collins, chief executive of Shell UK, is to chair the committee.

Mr. Reid, 55 years old, has been chairman and chief executive of Shell U.K. since 1985.

Business can cut carbon emissions fast and create new opportunities for profit, says chairman of Shell UK.

Today the Campaign is a partnership of 15 national statutory and voluntary organisations with Shell UK who all share a belief in supporting local environmental action.

At 6pm on 28 February 2008, there was an explosion and fire at the Shell UK terminal, for which Shell were fined £1 million.

The current Chairman is James Smith, formerly Chairman of Shell UK.