Lloyds Banking announced today that two of its non-executives have decided to stand down due to the increasing time demands required by their roles.Carolyn McCall, chief executive of Guardian Media Group (GMG), has decided to stand down from the board at the end of this year. Meanwhile, Philip Green, chief executive of United Utilities, plans to retire on 23 October. He has been a director since May 2007.Commenting on her decision to stand down, McCall said: 'Since my appointment to the Board in October 2008, the level of time commitment properly required of a non-executive director in the banking sector has increased dramatically.' 'The global banking crisis and the recent Walker report have thrown this issue into sharp relief. I have therefore decided, with regret, that the responsibilities of being a chief executive make it impossible to dedicate the time that I know is required to Lloyds.'Green said: 'Given the increasing time demands on the non-executive directors that the role quite rightly requires, I feel that now is an appropriate time to stand down.'