Allotment: Onion bulbs a flop

Yep, the onion sets I planted at the allotment hardly did anything.  Some swelled a bit, maybe doubled or tripled in size, but a long way to from being an actual onion.  Not sure if maybe the site doesn't get enough sun, or if it was some other issue.  Anyway, I'll be able to use these, but probably won't try again next year.