The BBC’s in-house newsletter apparently has revealed that a second spin-off of Doctor Who is being launched. The first, Torchwood, starts this Fall, and is aimed at adults. The new series will be aimed at kids, and is being done by CBBC (the children’s channel):
“CBBC is developing a spin-off series from Doctor Who based on the adventures of investigative journalist Sarah Jane, played by Elizabeth Sladen, and to be written by Russell T Davies.”
Outpost Gallifrey (my source for Doctor Who news — VERY reliable) has heard from a variety of sources that the working title of the show is Sarah Jane Investigates.