Thanks for the encouraging comments.
Donna: Thankyou. You noticed my limited palette. I get too carried away by colours if I have them all there to choose from!
James: Thanks for the suggestion about the clouds. I think I need to concentrate more on tones - sometimes they are really way out and I ruin the space in the picture.
Steve and Graham T: Cheers! (Steve, I hope you grabbed your easel and went!)
Chantal: Thankyou. I like reducing things to colours and shapes and don't have very good 3D vision so most things look abstract to me, anyway!
Dave: Thanks! Yes, scaling up is the big challenge ...