Another cloud method
As a beginner, I am still fiddling around with clouds. Another potentially successful method seems to be the following:
Make the whole sky area quite wet, wait for half a minute. Stipple with blue color around the intended clouds, thus roughly sketching the form. Doing so, put in some "twigs and branches" if you like. Then fill the non-cloud areas with the same colour (or varying colours). Then, immediately after, stipple-blend the rims of the clouds with a moist (never wet and never dry) brush (or sponge), quickly zigzagging along the rims, inside and outside the blue.
Now and then clean the brush with some moist paper cloth or similar. All this must be done relatively fast, while the paper is still quite wet. After that action, lean back and relax, watching the clouds taking their final form.
I believe Bob used a similar method in his painting of the village scene with a pond and cricket match (Wrea Green).