Help with weed clearing, suggestions.

You could try putting a mulch down. This will suppress a lot of the weeds, and any that get through will be weakened and easier to deal with.

A trowel is useful for digging out individual weeds.

I use a bog standard hoe & find no problems.

Are your plants too close toether?

Thanks all, I don't think the onions etc are too close, but I stupidly didn't plant the individual plants  in parallel to the preceding row making it hard to get the hoe through. Will give the fork a go or revert to hand weeding.

Not sure on the size and shape of the onion bed but I have a bed of about 1mtrx1.5mtr and lots of overwintering onions.

Also got lots of small weeds so I went and bought a bag of sharp sand from Wilks. Slightly course to the hand. I spread this by hand around all the onions. At the same time hand picking out any significant weeds that were sprouting.

Seems to have come out about an inch or so deep and has compacted down nicely. No weeds have made it through in the last 3 weeks and the onions are doing fine. Hoping that the sharp sand deters slug and snails also. Acts as a good mulch as it allows water through.

Come the end of the season it will simply get dug in to aid drainage.