Tabrett's official Twitter account is: https://twitter.com/therealtabrett
She's also in Instagram: http://instagram.com/therealtabrettbethell
You can check these pages too, if you like them better:
http://www.iphoneogram.com/u/764580039 & http://ink361.com/therealtabrettbethell
Important to note, that even if you aren't on Twitter often or you don't have an account, you should register and follow Tabrett's account and every film and tv show's account as well that she's been in. Social media has become an important factor in the entertainment industry and the decision making people might be convinced to choose Tabrett or her films/tv shows instead of something else if they see the big fan support. The same goes for the films/tv shows' Facebook pages as well.
So, click on those Follow and Like buttons because it could make a difference!
https://twitter.com/AzureProductions - for Sanctuary