Grey Bugs on Broccoli

Hello, I just went to go cut some Broccoli and when I did I noticed that there is what can only be described as an infestation of small grey bugs all over the heads and stem? They have literally covered the main head and even though washing off got rid of some it didn't get rid of them all and just damaged the plant.
Can anyone tell me what they are?
I do have a picture but until the forum is fixed I can't post it.
Can anyone tell me what they are?
I do have a picture but until the forum is fixed I can't post it.
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Spray with water or v dilute soft soap solution or garlic extract with oil or some combination thereof. Then (and only then, or they'll be killed too) collect up all the ladybirds (adults and especially larvae) you can find and let them feast on the remains. Plant/sow pot marigolds or other nectar rich flowers nearby the next brassica crop to attract hoverflies, whose larvae feed even more voraciously on aphids than ladybirds' do.