To her Brussels counterpart Maros Sefcovic, the Foreign Secretary threatened to invoke Article 16 if the EU "failed to comply." Mme Truss and Mr Sefcovic will meet for the first time on Thursday.
Article 16 of the Northern Ireland Protocol allows one party to unilaterally suspend the treaty's rules.
Mr. Redwood, a Conservative MP, has now hailed Ms. Truss'
"Continually" breaching and distorting the Northern Ireland Protocol, he claims.
In a tweet, Wokingham MP Liz Truss said: "Glad Liz Truss is pushing for rational UK-NI trade agreement."
the UK should simply take control of all internal UK trade and let it flow, as implied in the original Agreement.
the Protocol continuously breaks and distorts."
The Northern Ireland Protocol is intended to prevent customs checks at the Irish border.
It allows free movement of products, including pharmaceuticals, between the two countries.
However, goods from the rest of the UK are checked to ensure they meet EU requirements.
A "grace period" has prevented product movement regulations.
In January, the UK Government extended the grace period indefinitely.
Lord Frost and Mr Sefcovic met multiple times to work out the Protocol's kinks.
Ms Truss, who took over critical Brexit negotiations from Lord Frost last year, said she will "bring forth our constructive suggestions to overcome" the Northern Ireland Protocol difficulties.
Ms Truss committed not to "sign up" for anything that does not assist Northern Ireland.
If the EU does not cooperate, I shall invoke Article 16," she stated in a Telegraph piece.
"But let me be clear: I will not sign anything that prevents Northern Ireland from sharing in UK tax and spending decisions, or that still requires inspections on goods going within our own country."
"My priority is to keep Northern Ireland peaceful."
"I prefer a negotiated settlement, but I am willing to deploy lawful tools, including Article 16.
"This protection clause was specifically created – and agreed upon by all parties – to ease acute problems.
"The EU used this article to impose a hard border on vaccine exports and, in withdrawing it, asserted its right to do so again."
If no deal is reached with Brussels, Boris Johnson has threatened to activate Article 16 of the Protocol.
Despite the UK's reported softening, Downing Street has maintained the option of invoking Article 16 remains.