Many thanks to George (Buggies) for the Russell Hobbs kettle parts to repair the fault reported here:
https://www.vintage-radio.net/forum/...d.php?t=135758
Being from a soft water area, George's element was in much better condition than my calcium encrusted one so it's better than I could have hoped. So quiet and quick!
I've kept the original faulty switch and may try to dismantle it out of academic (& Forum) interest but it strongly resembles a round tuit...
Thanks again, George.