Working with "northern european" retailers myself, I can tell you're in for a bumpy ride (their scale is so huge they can basically force your suppliers to stop

Working with "northern european" retailers myself, I can tell you're in for a bumpy ride (their scale is so huge they can basically force your suppliers to stop supplying you if they want to), but there's definitely a market for food at reasonable prices from small producers. Good luck in your endeavour!