Nicola Sturgeon has publicly warned that any "assault" from the Tories on Scotland's devolved powers would only "further boost support for independence".
The First Minister shared a Financial Times article on her Twitter this morning which reported on Johnson's plans to seize power over Scotland and the devolved nation's food standards, environment and animal welfare.
It comes as SNP cabinet secretary Michael Russell warned that if the legislation was passed Scotland would have 'no intention of implementing it' and England would have to face Scots in the court of law.
Now Nicola Sturgeon has given a stark warning to Boris and the UK Government over the "assault" on Scotland's powers.
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The First Minister shared the article saying: "Make no mistake, this would be a full scale assault on devolution - a blatant move to erode the powers of the Scottish Parliament in key areas.
"If the Tories want to further boost support for independence, this is the way to do it".
Mr Johnson's Government is expected to bring forward legislation to the House of Commons in the autumn that may entail state aid policies - such as subsidising companies - being reserved to Westminster.
Scotland's Constitution Secretary Mike Russell has previously said plans to enshrine a UK "internal market" after Brexit would seriously undermine devolution, describing them as a potential "power grab".
In a letter to Cabinet Office minister Michael Gove, Mr Russell said he is concerned about proposals for an external body that would "test" whether a bill in Holyrood affected the UK's internal market and plans for a "mutual recognition regime", which he said could lower regulatory standards beyond what the Scottish Parliament found acceptable.
In response, Mr Gove accused him of trying to "confect" a political row.
There are particular fears that if Westminster seizes control over the Scots food market, it could lead to a drop in standards.
Since Brexit the UK no longer has to adhere to strict EU food standards and one particular controversy is that supermarkets could end up selling chlorinated chicken.
Aldi and Waitrose are among the supermarkets so far that have warned that they won't sell chlorinated chicken or produce food that isn't up to a certain standard.
