A mass of false widow spiders - what to do?

Here's a bit of a quandry: during a night slug hunt spotted five+ false widows in my composting/utility area in the garden. I tried to take pictures at night - when they emerge, but they don't like the
light. They have clear markings on their abdomens. I am running the garden (mostly) to encourage most wildlife and I love spiders; the are a vital part of the garden's developing eco-system. The area is small - about 2x2m, and used daily, housing water butts, compost bins, tool shed, flower pots etc, so there is not a way I can avoid it. I have seen the webs made across the compost bins, but suspect they are elsewhere too. I don't usually do a slug hunt in this composting area at night, so haven't spotted the spiders there.
I have workmen
coming to repair the shed. I imagine there is a fair chance they might
encounter them, as we will need to move the bins to get access for
works... Friends regularly help me out, in that area too. They would probably only bite "if disturbed" but they are disturbed there quite a lot.
Has anyone here been bitten by an ID'd false widow? Are they pretty minor?
Your thoughts are welcome.
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Have some antiseptic lotion and anti itch cream to hand, just in case.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw