Nicola Sturgeon has the warned the UK Government it would be an "outrage" if Tory ministers block gender recognition reforms passed by Holyrood.
The First Minister hit out after reports claimed Rishi Sunak will act on legal advice this week and halt the GRR legislation from becoming law.
It would be the first time that legislation passed by MSPs in the Scottish Parliament will have been struck down by Westminster since the devolution era began in 1999.