TBL Families - which is scheduled to air later in the year is now being filmed, with Tiff returning as a full time trainer. New host Fiona Falkiner spilled the beans on Twitter:
"Good morning! Getting glam on set today for biggestloserau https://instagram.com/p/1Y4LgoPF29/"
An article in The Daily Telegraph provides further clues, Tiffiny states:
"Poor Edward is battling on his own back home (in Brisbane) but we are travelling to see each other on weekends"
Looks like Tiff has moved to Sydney from Brisbane in order to film the series. Channel Ten have also officially announced Tiff's return to the show with a brand new photo which was shot recently (above).
Edit: Daily Telegraph have another article on TBL families being filmed. TV Tonight also have a story on Tiff.