In a letter to the EU’s chief negotiator Michel Barnier, Mr Frost said the EU’s proposed deal “contains novel and unbalanced proposals which would bind this country to EU law or standards”.
The letter sent on Tuesday reads: “Overall, at this moment in negotiations, what is on offer is not a fair free trade relationship between close economic partners, but a relatively low-quality trade agreement coming with unprecedented EU oversight of our laws and institutions.
“It does not have to be like this.
“I remain convinced that it would be very straightforward for us to agree a modern and high-quality FTA and other separate agreements, like those you have agreed with other close partners around the world, and that we could do so quickly.
“I do hope that in the weeks to come the EU will think again about its proposals in a way that will enable us to then find a rapid and constructive alternative way forward.”