A great set of illustrations by Tracey Slater, http://www.traceyslater.co.uk/ her style has that naive look and is really well observed. Lovely mark making.
Next up Jake Richardson http://jakerichardson.co.uk/ I really like his graphic style and simplicity.
Here’s James Carrol’s work, http://jamescarrollillustration.tumblr.com/ again lovely composition and line work. Love the storytelling through the illustration and his humour.
and finally James Longhorn, http://jameslonghornillustration.tumblr.com/ I like this illustrators work, the humour, the naive style, and his attention to detail and observation again strong.