The last one was nearly a decade old, and the filter mesh had gacked up with lime scale, and I'd broken it trying to get the scale off. So it was time for a new one.
Tesco only had one model available. Good size, large transparent window going right round the front so you can see the water level without a silly little floating ball, a base which the top could swivel on, and one extremely strange feature that I didn't immediately notice. And I bought it.
Home, replaced the old kettle with this new one, filled it with water, and then boiled the first jug full.
Let's just say that it's a real geek kettle. It glows in the dark. It glows blue in the dark. There's a light inside, and it shines out through that large window.
I can't see any good reason for this feature, but oh does it look cool!