I just moved into this flat and am trying to get my washing machine up
and running. The removal men kindly plugged it in for me but they said
I needed to get a jubilee clip to make sure the hose stays on the water
inlet.

Have bought said jubilee clip, from Wilkinsons, at least when I asked
for a jubilee clip the assistant came up with this. It's a ring with a
screw at the side. I've tried unscrewing the screw to open up the ring
but nothing happens. Have I bought the wrong thing, or is there perhaps
a superior type of jubilee clip which I could buy, which might be easier
to use?

Sorry for asking such an elementary question.

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Sue Beans