I should have guessed it would have been a simple answer like that, cheers!
Thanks for the tip about using hardwood to create the ash. In one of the pieces I read the author said to use the type of wood that the fungus was found on to create the ash for best effect, they were the only one to say this so it might not be essential. Using hardwood makes sense though, so I'll be sure to follow your advice.
Cheers,
Al