Thank you Dee, we are about to do another inspection on the weekend, we will see if they have done much now they have been fed the syrup, thanks for your ( and @Valli’s ) advice I will make the syrup as you suggested.
I have been told that the hot strong winds can dry out the Nector in the flowers so they may have been short on Nector even though there was plenty of pollen around, this is the season for hot strong easterly winds so I will keep this in mind for the years to come.
The fires are now under control and the wind has settled for the day, I am going to inspect the area tomorrow to see how much is in flower.