For Aitchison the backgrounds of his painting were as important as the foreground and were loving worked with a great attention to detail. This is very evident in the deceptively simple still life "Grey Bird". Here we see the tonal composition of Aitchison's carefully chosen colours with the band of Aitchison pink perfectly balancing the slender vase in the midpoint of the painting. Every thing is working here and the painting is any thing but simple
When asked about the deeper meaning of his work Aitchison responded: 'I don't know what it all means. The only thing that matters to me is that it works. I just paint the things I'm turned on to. Why would anyone paint things they didn't like?' It is this attachment and love for the subjects he painted that comes through clearly in his work and makes the result so successful.