Greetings All,
Regarding how to apply a fix to the issue as pictured and explained below, I seek some options to remedy the situation. TIA 🙂 sorry for the average pics
Shown here is the gap between bath and basin. A wooden skirt is somewhat affixed, the tiles abruptly end and do not continue under the vanity, hence the floorboards are visible.

It’s the same the other side between vanity and wall.

I’m unsure why tiling is not complete.
The vanity is plumbed, sitting on silicone, and screwed to wall,
I’d appreciate some thoughts and solutions please.
Current ideas includes as follows,  I know there’s a balance between involvement and results.
1. Replace skirting strip, with sealant applied. Access is limiting to ensure a decent job.
2. Add an infill piece that slopes from rearmost to front to allow drainage. Again access limited but could probably paint something or pipe a bead and smooth with long paddle.
3. Yep should be first, but to limit involvement, is to remove vanity, tile over floorboards, replace vanity.
4. The tiler would have known the above fix, or maybe only so many tiles were available, lol.
5. Quick n easy ? Spray on caravan roof sealant and watch it puddle in an uncleanable recess is not really feasible I suppose.
Appreciate the help and suggestions, support etc.
A balance of the above ideas may be ideal, but maybe there’s a trick to this I haven’t seen…
Cheers