Getting into cistern

That is the key - unscrew the collar - it should only be done up finger tight.

On mine - yours may vary- the ying-yang thingies are the way in! Depress one of them - and you should be able to see a 'thumb-nail' depression in the side of the other half. Insert thumb nail -or flat blade screwdriver- into the depression and pull out vertically. The other half of the button should then pull out easily. You'll see a screw at the base of the aperture that accepts the ying-yang buttons. This screw is the securing mechanism for holding the ceramic lid onto the cistern.

HTH

Ours is as John said. The shiny ring around the buttons just unscrews, then all becomes clear. If you can't get a grip to unscrew, try slipping a "Marigold" on or a latex glove.

Unless you have one like Brian's of course.

:¬)

Many thanks Brian, it was one like yours, the ying-yang mystery is now solved.

If this is going to be a common failure mode then I can see a replacement flush button market developing in due course.

Some makes do indeed just lift off and it may be that once word get around that the screwed down ones are unfixable the designs may change pronto.

Thamks for your thanls! - I was 'given' the key to the mystery by the merchant from whom I purchased the toilet set. After I'd spent 'yonks' examining the contraption in the showroom, I 'caught the eye' of a yoof .... 'Oi! How do I get into this .... ?; 'Like this, Sir/Cur!' he demonstrated ... in seconds .... :)