The message
from "Endulini" contains these words:

I have just removed some 'worm' damage from one of my floorboards which has
left me with a small crescent shaped hole (about 4 inches long and a max of
2 inches wide) going right-through the board. I appreciate that I'll
probably have to replace the board at some point soon but as a short-term
solution is there any wood-filler I could use to plug the hole in the
meantime?

Put a bit of wood underneath to support it and fill with a mix of PVA
and sawdust.

--
Skipweasel
Pay no attention to that man behind the curtain.