Hi thanks for replying 🙂
I didn’t see what stung me and no one was with me. Oh, except my dog. A dad had jumped out of his inflatable boat to save his daughter, who was drowning on other side of river, leaving his son alone in a drifting boat, so I swam out and towed the boy back in. I saw about 10 people swim in that section of the river but not on the side I was in. I had been swimming in many other parts of the river that day with no strange stings. I didn’t hear anyone else complaining. I have asked locals this evening. Strangely a friend in a nearby village (same river) said her daughter said she’d seen a jelly fish while swimming this week end and that they had been teasing her ever since!
I have found articles on freshwater jellyfish seen occasionally in the UK since 1880 but all the articles say there have never been any stings documented so they assume they do not sting. Thanks. Sarah