Shirley Hughes (1927 - 2022) was a widely loved writer and illustrator of children's books. She started off mostly illustrating for others before writing her own, most famously Dogger and the Alfie and Annie-Rose books. Here is a lovely interview with Shirley Hughes where she talks about some of her focuses in her books and some other books and illustrators she admires, here is another interview where she talks in quite a lot of detail about her style and training. There are also some really interesting observations on how her observations effect her art, including how people stand in different times due to different fashions.