Just watched this on iPlayer.
Zara is absolutely vile, unprofessional, and a bully. 
I hope Zara's temporary exit from the show, because of Elisabeth Dermot Walsh going on maternity leave, is due to her being reported to the GMC. And, if Sid commits suicide because of her I don't want her back, that would make Zara irredeemable as a character.

I suspect this will tie in with Howard's departure, because Ian Kelsey films his final episode next month. I used to have a crush on him when I was a teenager, when he was in Casualty and Down to Earth.
On her picture in the opening titles, you can clearly lip read her saying, "I'm with a patient!" aggressively.
Emma's old picture in the opening titles reminded me of duck-face, from Four Weddings and a Funeral.(aka, Anna Chancellor)