https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/animals/spiders-and-harvestmen/
Spiders and Harvestmen - British Animals - Woodland Trust
Spiders are air-breathing arthropods with eight legs. They are the largest order (Araneae) of arachnids, with over 40,000 living species recorded.
british animalsspidersharvestmenwoodlandtrust