Finally back to painting after several weeks. The sunlight was glinting off the grass, giving it a silvery blue sheen in places. I changed the tree line a bit to make the composition stronger. I'm learning that I don't have to make a map of where I was and copy actual shapes, but that in landscape it is quite ok to edit or change features to make a painting. I don't know why that hasn't sunk in before now - it's not a new idea!