Moss in new bed - to keep it not to keep?

I’m intending on putting some fruit bushes in this new bed. I’ve had polythene over it for several months and yesterday when I took a look it was like this. Now I love a bit of moss and quite like the look, throw a few rocks in and some ferns. But will the fruit bushes?? If I do decide to remove it, how do I stop it coming back? Guessing it’s due to the heavy clay soil.

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It tends to colonise empty spaces if the conditions are right, so if it isn't actually too shady, it's probably just the damper soil, and the fact that it was covered.
I find if I stand still too long in my garden I tend to grow moss too
I live in west central Scotland - not where that photo is...