Taoiseach Leo Varadkar has agreed to write to European Commissioner for the Environment Virginijus Sinkevicius inviting him to Ireland to discuss issues around the nitrates derogation, Minister of State Martin Heydon confirmed to the Irish Farmers Journal .The Irish Farmers' Association (IFA) met with Varadkar on Friday at Fine Gael's annual think-in at the Strand Hotel in Limerick city, where issues around the cut to the derogation and delayed payments were discussed.