London ? Prime Minister Tony Blair, battered over his Iraq policy and a series of scandals in his cabinet, is facing a growing revolt within his Labor Party as scores of Labor members of Parliament are demanding that he set a date for stepping aside.

“I have a job for him: ambassador to Outer Mongolia,” said Robert Wareing, a Labor member of Parliament for 23 years. He said “a very strong feeling” in the party that Blair should go has increased since Labor’s dismal third-place showing in local elections Thursday.

The future of the Blair government, the Bush administration’s closest European ally, suddenly seems more shaky and uncertain. Blair, already suffering low approval ratings and rebellion among some factions of his party after nine years in office, is facing sharp new attacks since the election and a controversial cabinet reshuffle Friday.

A BBC survey Sunday found 52 of 172 Labor members of Parliament questioned said Blair should resign within a year. Labor MPs interviewed said a large number of their colleagues, many of whom have been Blair supporters in the past, are endorsing a letter demanding Blair announce his timetable for stepping down.

“He said he’s going to go. We just want to know when he’s going to go; it’s a reasonable request,” said Ian Gibson, a Labor MP who said 50 to 100 Labor MPs believe Blair should say when he is going to leave office. Labor has 353 members in the 646-seat House of Commons.

Blair, who was elected to a third term last year, has publicly said he would not seek a fourth term in elections that must be held by 2010, but he has not said when he will step aside. His approval ratings have fallen to just over 30 percent, and recent polls show nearly half the public wants him to resign this year.

Blair has been harshly criticized over his support for the Iraq war and his close relationship with President Bush. Many Labor members say Blair has led Labor too far to the political right and abandoned its traditional working and middle class base.