The Eastern European state said securing residency rights for its people and a bumper exit payment from Westminster were its key demands for the upcoming divorce talks.
There were an estimated 223,000 Romanians living in the UK in 2015, a number which was likely boosted further by a surge in arrivals from the country throughout last year.
Romanian has laid out its Brexit red lines to Michel Barnier
Record levels of migration from EU countries played a pivotal role in the Brexit referendum, with many parts of the country heavily affected by the issue voting to leave.
Theresa May has come under intense pressure from across the political divide to guarantee the residency rights of EU nationals living in Britain, but has said that doing so would undermine her negotiating position with Brussels.
The Brexit negotiator met with the Romanian president Klaus Johannis
The pair discussed the rights of EU citizens to stay in Britain
Romania’s demands came to light after its president, Klaus Johannis, met with the EU’s chief Brexit negotiator Michel Barnier yesterday to discuss the upcoming talks.
In a statement his office said: "During the talks the President stressed that Romania's main priority is that provisions are made to protect the rights and interests of Romanian citizens in the UK.
“As a result of these talks, they should enjoy the same rights as they have already acquired after Brexit.
“The President also stressed the importance of beginning negotiations related to the rights of EU citizens in the UK as soon as possible."
Romania's main priority is that provisions are made to protect the rights and interests of Romanian citizens in the UK
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Romanian President Klaus Johannis
It added: “The head of state said that it is necessary to address this in the first phase of the negotiations along with the financial issues involved in the withdrawal of Britain from the EU.”
Mr Johannis also praised the EU Commission over its approach to Brexit, which has heavily involved consulting member states, and reiterated the Brussels rhetoric that the unity of the remaining 27 countries must come first.
However, he did add that Romania supports continued cooperation with Britain on a number of important issues even after it has left the bloc, with security and defence likely to be high up the list of priorities.
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Romania is one of five countries which are slated to hold the rotating presidency of the EU during the Brexit talks, meaning it will exert a particular influence on their direction.
Budapest will lead the bloc’s policy objectives for the first six months of 2019, which is when the talks with the UK are expected to come to their conclusion two years on from the triggering of Article 50.
Mr Barnier is currently on a whirlwind tour of the continent consulting with member states over the impending divorce proceedings, which are due to start before the end of March this year.