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The Meadow Spider (Pardosa saltans) or Meadow Wolf Spider is of the family Lycosidae which is in the genus Pardosa. This is a small dark species but there are a number of similar wolf spiders so it can only be identified with 100% certainty by microscopic examination.
"Requires examination at high magnification in good lighting, typically examination of the genitalia." Bee, L., Oxford, G., & Smith, H. (2020). Britain's Spiders: A Field Guide. Second Edition. Princeton University Press.