Hello. I've missed this thread whilst lurking and reading others. Slugs are dreadful this year, biological warfare used immediately prior to this spell of rainy weather (since Jubilee weekend), and seems likely the nematodes have drowned or washed away. Everything's slow, late and stunted due to temperature hiccups, low light levels and lack of rain in first quarter and far too many windy, squally flash downpours since. But the Wisteria's loved it.
As have slugs and snails.