Other sources indicate something that might be related - arrival of a "sniffer" WC-135 plane from Florida to UK that detects and monitors radioactive events. So there might be something going on (or not).

Anyway, why is it so bad to be concerned about health impact of even negligible radioactive release (are you sure newborns/sick do have the same threshold?) as an ordinary citizen, given the massive dishonesty of governments in the past in cases like Chernobyl or Fukushima? Why can't we just read in the newspapers within 2-3 days "we detected a minuscule amount of radiation, probably related to bad weather" or something, rather than keep a lid on it? Don't we deserve better? Or do we have to be handled like kindergarteners with somebody else deciding what is good for us to know?

And please stop with the banana examples, it's getting tiring. You 100% know there are various radioactive elements emitting different types of radiation, some way more dangerous than the others. Iodine by itself is just a first indicator but it's not the only element that gets released; some of the others are way more dangerous and we deserve to know. Not to mention there is a very different outcome if you just get some element on your skin or if it gets incorporated (cumulatively!) into your bones, organs or gets stuck in your lungs.