The Dead Sea is probably the world’s most famous brine ‘bath’.

We’ve all seen the pictures of tourists floating on their backs reading the paper with a cup of tea. The lowest place on Earth, 423m below sea level, it’s roughly 8.6 times saltier than sea water.

But compare that to Droitwich brine, which is roughly 10 times saltier than the sea.

Writing in 800AD, Nennius, the author of the Historia Brittonum, described the springs as one of the wonders of Britain.