Prime Minister Tony Blair has scotched notions that he might quit office in the coming months as bad news piles up for his governing Labour Party. He has seen his popularity dip and has been politically weakened by a series of scandals in his party over recent months -- the latest blow being the arrest of Lord Michael Levy, Labour's chief fundraiser, by police investigating alleged corruption in the way Britain's main political parties raise money. And Lord Roy Hattersley, a former Labour deputy leader, weighed in Sunday, urging the prime minister to step down at the centre-left party's conference in September.But Blair, at the annual summit of the Group of Eight industrialised democracies in Saint Petersburg, gave his strongest indication yet that he intends to stay in office for at least another year. He said he did not want a "great bout of speculation" about his departure timetable. "I'm not sitting there, you know, obsessing the entire time about when the precise date is and all the rest of it," he told BBC television on Sunday. "I've made it clear all the way through, I'll carry on doing the job. And so I look forward to next year's G8 of course, but in the end the most important thing is to do the job," he added.