See the whole set at the BBC Doctor Who site.
Artist Peter McKinstry worked on concept art for seasons 2-4 of Doctor Who. This was his original vision for The Ood.
Deviant art user kaduflyer, A.K.A. David Bonneywell, is a concept artist for Doctor Who and he has released concept art of Nephew and Uncle. The episode The Doctors Wife was originally slated for 2010, but got bumped up to 2011. Due to this bump, changes were made to the script, and the concept art.
Seen above is his work for Uncle.