About 15 years ago a Goodyear blimp lost power, or partial power, over the Thames in Central London while I was cycling nearby. Obviously this situation might have been far more dangerous in a heavier-than-air craft, but it would have been very unpleasant on that blustery evening as it was being thrown around quite dramatically. I was crossing Tower Bridge and stopped to watch for a while, then saw it on the TV news when I got home. About 4 years ago I saw one, possibly the Zepellin NT coming across the channel towards Herne Bay and making very little progress in the headwind.
The Zep NT also flew over my workshop in London a few years ago. I was outside in the yard and suddenly heard a gentle whirring sound, looked up and it was directly overhead, I had not heard it approaching, it was amazingly quiet, far quiter than the Goodyear type which you can hear for 20 minutes before they become visible over the roof tops.