Toilet constantly dripping

[Bigtree]

My downstairs toilet seems to be constantly drip drip dripping. I have changed the part on the left hand side but it still seems to be dripping.
The only other part that I can see to change is the part on the right…….can any of you help to identify what I’d need to buy?

 

[foxhole]

You neglected to mention where is dripping from into the toilet or the overflow?

 

[matlob]

There is a seal at the bottom of the flush valve which has probably failed

This one seems to be similar and probably best to swap the lot.

https://www.amazon.co.uk/Mxfans-Toilet-Cistern-Button-Sealing/dp/B07DRB84Z8/ref=asc_df_B07DRB84Z8/?tag=googshopuk-21&linkCode=df0&hvadid=372163213199&hvpos=&hvnetw=g&hvrand=17363856894905892445&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006601&hvtargid=pla-821634108124&psc=1&tag=&ref=&adgrpid=83288553744&hvpone=&hvptwo=&hvadid=372163213199&hvpos=&hvnetw=g&hvrand=17363856894905892445&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006601&hvtargid=pla-821634108124

 

[HERTS P&D]

Un-clip the flush valve by turning anti-clockwise and lift up. Remove the washer on the bottom of the flush valve, and turn it over and refit it.
Clean off any limescale you find.

Andy

 

[Bigtree]

Thank you both for your replies. Very much appreciated

 

[Mr Chibs]

BIL had grit in the top of the cistern filler, I didn't believe him until I saw a photo.
This stopped the seal in the top of the filler, so it was constantly trying to fill the cistern, which meant the overflow into the pan was constantly on.

Once clean out, it worked properly.

 

[gas112]

If you dry back of your toilet pan then couple of minutes later put some toilet paper on the bowl it will be wet . It will be your flush valve worn as per herts