The vice-president of France's biggest farming union has said European Union farmers could lose billions in subsidy payments when the UK leaves.
Arnold Puech-d'Alissac, from FNSEA, told France 24 that the biggest concern was calculating how much the next CAP budget will be in light of Brexit.
"We could lose some billions," he said.
"But if you lose some billions out the EU budget the UK will lose all the European markets for its financial services, for example.
"That will be a big problem for the UK, the negotiations just started, we've got 18 months for an agreement, they will find an agreement."
Mr Puech-d'Alissac also voiced concern over the Irish border and potential non-EU goods crossing it.
"You need to find a solution, to have a border between these two countries is impossible.
"But maybe at the exit you can have strict control," he said.
'Hard border'
In May the president of another French farming union said there should be a hard border between the two countries to prevent non-EU food entering the EU.
Christophe Hillairet, who has been president of the Chamber of Agriculture of Ile de France for over 10 years, said the British government will sign deals to import food from Commonwealth countries post-Brexit and that those products could then be transported across a future EU land border via Northern Ireland.
Mr Hillairet expressed fears to Agra Europe that lamb from New Zealand could arrive in Northern Ireland and cross a 'soft' border into the Republic of Ireland, before entering the mainland EU markets.
Irish Creamery president John Comer said the only people enjoying Mr Hillariet's comments were anti-EU British eurosceptics.
"That must not happen, and with respect to our French friends, we would prefer them to reflect on the common good and not just on their own particular sectoral interests."
Speaking from Leinster House, Sinn Féin’s agriculture spokesman, Martin Kenny expressed deep concern at the remarks.
"We can assure him that Irish farmers do not want an influx of non-EU produce either, but it is a pity that, instead of listening to us and supporting designated special status for the North within the EU in order to secure the integrity of the customs union, he should take a Franco-centric approach.
"Calls for a hard border are not helpful."
