Tabrett has confirmed that her birthday is on May 13 in the NYCastings.com interview. Though she's also posted a picture of her birthday cake on Instagram in May (http://ink361.com/app/photo/ig-719738127123522250_764580039), but it's better to be sure.
Tabrett has a new agency now, Industry Entertainment Productions, her agent is Kim Callahan. She's still with RGM in Australia. But it looks like she's left RoK Models.