► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />The FSA and Ofgem are investigating claims that 'unusual trading activity' may have affected gas prices. Energy correspondent Guy Chazan and Brooke Masters, chief regulation correspondent, talk to Daniel Garrahan about the what the probe means for the energy sector.<br /><br />Related Articles:<br />http://www.ft.com/cms/s/0/cd2ae20e-2ce3-11e2-beb2-00144feabdc0.html<br />http://www.ft.com/cms/s/0/6257f368-2d92-11e2-9b88-00144feabdc0.html<br /><br />For more video content from the Financial Times visit http://www.FT.com/video