Hairy Dragonfly in Northampton town centre

Jim Dunkley has reported finding a female Hairy Dragonfly in Northampton town centre - on the window sill of Clark's shoe shop of all places. Where did she come from and how did she end up there? Jim said she must have been looking for the wi-fi for her sat-nav, to find her way back home. Looking at her colouration, I would say she is a day or two old.