I ended up having to paint this one twice. I bought new masking tape which I normally use around the border of a watercolour painting. Never had a problem before but when I removed the masking tape this time, it tore the watercolour paper. So I had start again. Second time round I didn't use masking tape - just means I have a more messy border.
Autumn begins measures 10 x 8 inches and is painted on 300gsm Daler Rowney "The Langton" NOT watercolour paper .
Many thanks to Nicola B for the reference photo.