British Gas, EON, Octopus, EDF and OVO customers issued PS237 freezer message / Octopus and its customers ask Treasury to back zonal electricity pricing / British Gas, Octopus, OVO, EON and EDF customers told to unplug 5 appliances as bills rise / Octopus customers can 'donate' energy to people facing fuel poverty in new trial / Octopus and OVO customers warned 'unplug' over devices on standby for 20 hours a day / British Gas, OVO, EDF, EON, Octopus customers warned they have hours to avoid PS149 hike / British Gas, EON and Octopus customers told 'unplug' five appliances for PS200 / British Gas, EDF, EON and Octopus customers on state pension can to cut bill to PS0 / British Gas, EDF, OVO and Octopus customers warned they must 'act' by Sunday / Octopus to repay PS3bn of Bulb nationalisation costs