Water leak

Test with a garden hose showed it running in behind the rear trim panel?

Yet more snouting about shows this:

The water (sprayed onto hood by son) courses around until it reaches where the hood ends behind the drivers side window. The water now runs down into the body work. I f the hosepipe is kept on the water then appears on the inside from behind the plastic trim near the seatbelt anchor. Dropping the hood reveals a "well" where the water flows into the body and this stays full. The carpet on the parcel shelf is also wet in this corner. Is there a blocked drain system? The sill drain holes are clear.

Yes. The well drains through a tube that terminates in a rubber flapper valve just in front of the rear wheel. Run a stiff wire (carefully!) through the tube to clear it. Don't force it, or you may damage the tube.

If you run water into the well on the other side, you'll see how it's supposed to work.

Thanks - sorted. Both sides were partially blocked so I couldn't see how the system worked.

Morien