I cannot get the ExcelWriter to use the ExcelStyler's formatting. I have found a demo worksheet in another question which works fine. I have deleted the writer and replaced it with my own (I think identical) writer, but it's not working and I have no idea why!
I have attached both worksheets. If someone could point out the difference between the two I would be very grateful. I've tried a diff checker against the XML code in the files, but nothing is jumping out at me.