Katherine is represented for all acting work by Samira Higham at Independent Talent and for all writing work, by Cathy King at 42mp.
You can contact Samira here, and Cathy can be contacted via cathyking@42mp.com

For voiceover work Katherine is represented by Earache.  Her page is here:

You can also find her on Spotlight, here, and follow her on twitter at @KatherineJake.

Or write directly to her, at katherinejakeways@gmail.com