repeated sightings of a dolphin (or maybe porpoise) far up the Thames, reaching up to Richmond!
Its been seen on several days and on Sunday was in the Putney area and I managed to see it and shot a short very jerky and blurry video of which the above frame is one of the better ones.
News reports suggest that this could be a good thing - as in its come in search of fish - rather than a bad thing it being in distress.
Anyway, worth looking out at the river to see if you can see its fin passing by!
Updated: alas this story has a sad end.