http://m.huffpost.com/uk/entry/uk_57517a26e4b04a0827f18926?edition=uk&ir=Queer+Voices&section=us_queer-voices&utm_hp_ref=queer-voices&

“I wanted to show that Tilly has transitioned but nothing has changed,” Walton said.

For a simple visual clue, Tilly removes her bowtie and puts it in her hair.