I have some Santero onion seeds for 2024. I got them by accident with a seed order and even after they sent me what I had actually ordered, they said to keep them.
When I read the blurb, it seems they are a good companion for the Ailsa Craig seeds I have. The Ailsa Craig are for early sowing (probably Boxing Day or perhaps New Years Day) and are the giants. They don’t store that well though. The Santero I will do later (end Jan/beginning Feb) and they are supposed to grow very evenly into uniform bulbs that keep well.
With your selection Rowland, you look to have some good contenders for the heaviest onion and matching set classes