Centrica, the country’s largest energy supplier, has widened its search for gas to Norwegian waters, as Britain’s North Sea gas supplies dwindle, the company said on Tuesday.  The Norwegian government has granted British Gas’ parent company operatorship of three gas exploration licenses and a smaller stake in another, at a time when UK gas output is in constant decline and Norwegian exports to Britain are on the up. “Participation in the Norwegian sector broadens our approach to securing future supplies for our British Gas customers,” Centrica Energy managing director Jake Ulrich said. “We are pleased with this award and now look forward to progressing future opportunities in Norway.” The licenses include two fields provisionally named after 1970s English glam rockers T-Rex and Marc Bolan.  Centrica has been awarded 40 percent operatorship shares in Block 8/7 of the Northern North Sea, Block 6506/12 in the Norwegian Sea and Block6506/9 of the Norwegian Sea. It has also been granted a 30 percent share of Block 35/8 in the North Sea, the company said in a statement.