The white frame at the end is something I made from an old plastic window frame. I took out the glass and replaced it with some garden netting. This should keep the birds off until the onions get established. I also use the glass for some extra warmth for seedlings in the Spring.
Now I need to move onto the next bed. It needs a good topping up with soil and compost but that's a job for another day. Time for a cup of tea now.