If you move a garden pot that has been standing for a while, particularly after rain, and if you look closely where the pot was standing you may see some of these tiny little creatures (2.5mm (0.1in) long) begin to scurry around looking for cover. I believe this one maybe called Isotomurus palustris.
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April 2018, rear garden found under garden pot, Staffordshire, England. © Pete Hillman