Incorrect Nigel. Labour did call for a vote of no-confidence, it was refused by the tories
Labour called for a vote of confidence on the current government, and Boris Johnson.
Boris has already given a timetable for his finishing, and such a motion would cause confusion as to whether the vote was about the government, or about Boris.
By the way it was worded the Conservatives could refuse the debate. Labour were told that if they tabled a vote of confidence in the government it would be debated.

Because the Labour Party messed up, the Conservatives have said that they will call for a vote of confidence in the government. BBC News