Drain unblocked thanks for all the advice. I managed to remove the small grate (which I thought was fixed) and ended up scooping out the sludge with my hand and washed out with hose pipe.
@TheButchersDog started
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Drain unblocked thanks for all the advice.
I managed to remove the small grate (which I thought was fixed) and ended up scooping out the sludge with my hand and washed out with hose pipe.