In an earlier contribution to this discussion,
mjbarnard wrote:

New modern wc just installed. Close coupled pan and cistern. Pan is
"back to wall" and cistern rests directly on top it. All connections
satisfactory except those joining the pan to the cistern.

These are not the standard connecting bolts and plate.

Two bolts go through the bottom of the cistern and screw into fixings
within holes in the back of the pan. They are designed to do this
without anything between the pan and cistern.

Are you sure? I have a similar one, but mine has nuts under the cistern to
compress the sealing washers. Then the threaded ends of the bolts pass down
through holes in the pan, with further nuts underneath. Are yours not like
this?
--
Cheers,
Set Square
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