A humble address is a message to the King and can be used to call for papers from departments. If agreed by MPs, they are understood to be binding.
MPs will be told they are free to debate the conduct of Andrew and his relationship with the paedophile Jeffrey Epstein in the Commons.
Sir Lindsay Hoyle, the Speaker, is expected to say they can discuss Andrew because he has been stripped of his royal titles, meaning the usual convention does not apply.
The Liberal Democrats will attempt to force the government to release all documents relating to Andrew Mountbatten-Windsor’s appointment as a trade envoy.
The party will use its opposition day debate to table a humble address calling for the “release of papers relating to his appointment as special representative for trade and investment”. The party will also demand that the documents include those related to his vetting.