It will be the first time ministers in London have used powers to stop a Scottish bill from becoming law.
The UK government has decided to block a controversial Scottish bill designed to make it easier for people to change their legally recognised gender.
Ministers in London are concerned the bill affects UK-wide equality laws.
It will be the first ever use a Section 35 order, which stops a Scottish bill from becoming law.
Scotland’s first minister had said such a move would be an “outrage” and the Scottish government is likely to mount a legal challenge in response.
Scottish Secretary Alister Jack is expected to lay an order before the Westminster parliament on Tuesday to prevent the bill being sent to the King for Royal approval.
The Scottish government and the Scottish Parliament are being informed of the decision.