Trewin Restorick asks if Al Gore's new initiative, 24 Hours of Reality, will make a difference
Latest update confirms work to secure pipeline to seabed is proceeding well
But green groups remain angry over slow public reporting of leak
Oil giant confirms leak has been closed ahead of launch of government investigation
James Murray asks why it took the oil giant over two days to publicly announce the worst North Sea oil spill in a decade
But officials warn it is too early to confirm whether operation has been successful
The final amount leaked could be four times the volume that has spewed into the sea in the past week
Senior executive admits "hundreds of tonnes of oil" could be trapped in pipeline, as company rejects criticism over lack of transparency
RSA and Shell study suggests taxi drivers could receive subsidies for promoting smarter driving
National Grid, ScottishPower and Shell unveil proposal to use existing gas line to pump CO2 from Longannet power station to North Sea