11:20

Such is the government’s frustration at today’s contempt of parliament wrangle that Andrea Leadsom, the leader of the Commons, has written to the chair of the privileges committee, Kate Green, calling for an inquiry.

According to the prime minister’s spokesman, Leadsom’s letter said:

The government is concerned that the recent use of motions by humble address undermine good government in the national interest.

She added that the government fears Labour’s recent approach – which was used to force the government to publish economic assessments of Brexit, as well as in the current row over the legal advice – would “impact the ability of current and future governments to request and receive the best advice”.

Leadsom said the privileges committee was in a good position to carry out a “detailed inquiry”.

The fact that Leadsom has sent a letter suggests an inquiry into the use of the “humble address” procedure is likely to go ahead, even if the government amendment (which also calls for an inquiry - see 1.03pm) fails.