Plotters prepare to strike if Labour loses 350 seats on Thursday.
More on the plot:
The leadership challenge will be triggered, say rebels, if Labour loses about 300 seats of the 1,767 it is defending in the English council polls, or finishes third in terms of votes behind the Tories and the Liberal Democrats in key areas of the country, including London and the South-East. Rebels - who have given up hope of Gordon Brown ever launching a direct coup against Mr Blair - would then set about gathering the 70 MPs' signatures needed under the party's complex rules to trigger a challenge.
Remember, if you want Blair to stay in power, vote Labour on May 4th.
If you want a change of leader, vote anyone but Labour.
Update - Attention Labour candidates! Don't forget to libel those who criticise the party!