Competition in the Irish liquid milk market remains fierce, with Co Tyrone-based Strathroy Dairies consolidating its position as the main supplier to Lidl having taken a contract for an additional 18m litres off co-ops Aurivo and Arrabawn.While supermarkets will increase and decrease liquid milk contracts all the time with their various suppliers, the news that Strathroy had secured this sort of additional volume from Lidl is seen as significant.