Why is France facing a no-confidence vote and what happens next?

Michel Barnier’s use of a provision to allow government to pass a bill without Assemblée approval has prompted a no-confidence motion. Photograph: Sarah Meyssonnier/Reuters

The French parliament is expected to vote today on a no-confidence motion against prime minister Michel Barnier’s minority government.

Here’s the parliamentary arithmetic that explains how we got here and how the vote could play out.