Almost all of us know that putting sealer below a leak never, ever works. This does not mean that most of us are tempted to try it at some time or other. In any event I removed the sealant and will now try and trace the leak (s). The good part is that it is not the hull to deck joint. The fact that I am dealing with a headliner means that this is not as clear cut as one might think.
The area in question is the starboard side of the cockpit, where there a teak coaming extends inwards to provide a backrest.
With the teak coaming removed it was obvious that the whole area was a water (and mud) trap. The two outboard lockers appear to be watertight (?) on the bottom but I suspect that a crack exits somewhere which allows water to leak onto the headliner and then into the lockers below.
The small indentation on the left hand side of the photo is for a drain which was never fitted, but I believe is necessary.
