"jks" wrote in message
...

The water thunders out of the cistern ok but causes a certain amount of
splashing of the seat. It doesn't however flush things away very well
and I
usually have to flush twice. Does anyone know how to improve it?

Is the pan truly level, in all directions?


Yes.

Most of the water rushes round the rim to the front. Where it meets it
causes the plashes.


Sounds like you may have some blocked holes around the rim which are
allowing most of the water to fizz round rather than wash the bowl.
Try fishing a bit under the rim to check that all wash ways are clear,
something like a tie wrap is good for this
You may find a mirror useful to check around the underside of the rim also

Phil