from the BBC website
and from Sarah Jane. tv blog
Legendary comedian, Ronnie Corbett, has been confirmed as a guest star for a special Red Nose Day version of the highly acclaimed The Sarah Jane Adventures. BBC Wales are recording a one-off mini adventure to air on Comic Relief - Funny for Money airing on Friday 13 March BBC1 from 7pm.
The top rating children's drama comes from the makers of Doctor Who and stars Elisabeth Sladen as Sarah Jane Smith.
Executive Producer Russell T Davies said, "It's an honour to get involved with Red Nose Day, and with Ronnie Corbett, K-9 and an old enemy's return, we can promise Sarah Jane Smith's most extraordinary adventure yet!"
The BAFTA-nominated series sees Sarah Jane and the gang getting caught in a mysterious world of chases, danger, and monsters from outer space. The show has a huge following in its teatime slot on BBC One and the CBBC channel and the BBC Wales team are delighted to be contributing to Red Nose Day for a one-off mini adventure.
and from Sarah Jane. tv blog
right I guess the inclusion of the "Rednosicles" answers my first question.Details regarding the plot are rather sketchy. However, SARAH-JANE.tv can exclusively reveal that the short will feature a well-known comedian and an attack by Rednosicles(!) Yeah, I know... I can see you rolling your eyes! But give it a chance, it'll be aweshum. Plus it's a good oppurtunity for the cast to get back into the SJA groove prior to filming the third series, and have a little fun with their characters while they're at it! Cannae wait!