How can I remove this from my sink?

[StrikesAtticFlat]

Brown ring!!
I've tried bleach, a magic eraser, scrubbing with Cif but it won't budge!

It's light limestone scale. Close up the drain (blutak or a sticker will do if there's no mechanical stopper) and cover it completely in descaler. Leave it for as long as it takes.

Right, will do!!!

I find something called Viakal most effective. It does smell a bit though so do it in a well ventilated room.*

*Edited to say, that sounds like I'm suggesting you take the sink out, I'm meaning open the windows!

Washing powder maybe?

I used descaler on a sink like that once, and left it on for a long time. It ruined the chrome finish of the fittings.

Viakal. Spray on and leave for half hour it'll just rinse away.

barkeepers friend might work

Viakal limescale remover. Use the gel one that has to be poured on & is thick gel as it works better than the spray on one.

Hg limescale remover will fizz that away. The normal bottle not the spray one. The concentrated one tesco its about 4 quid

amzn.eu/d/4C4xC41

Limescale ring which HG limescale remover will remove in seconds!

Try something calked Barkeeper’s Friend available in Lakeland and on Amazon.

Lidl’s cheap limescale remover works a treat on stuff like this.

Barkeepers friend works well I find

I had no idea Viakal came in a gel... but thanks 😃😃

bottle of full fat cloak left to soak over night will also do it.

Pink Stuff worked for me for this exact problem.

OMG it's a miracle!!!! Thank you all so much!!!

One more pic as the previous suggested there was a mark on the chrome but there isn't.