Those 50 odd reports are back in the news. Here is clipping from the BBC:

A Labour motion requiring the government to release assessments of the impact of Brexit has been passed by MPs.

Speaker John Bercow told MPs he could consider contempt of Parliament claims if the government fails to release Brexit impact assessments.

Labour's motion which asked for a "humble address" requesting the Queen to direct Brexit Secretary David Davis to release the documents,

There was confusion during the debate about whether a vote triggered by Labour's use of an arcane parliamentary procedure would be binding.

Mr Bercow said motions of this kind have "traditionally been regarded as binding or effective".