This means that the actress will not be returning for the 50th Anniversary of Doctor Who next year but insists she has learnt a lot from the show.
She said: “I decided there’d be no cameo returns after I leave. I want the impact of the end of the Pond era to remain strong. I don’t want to spoil it by coming back a few episodes later to say hello.
“I feel like I’ve grown up and that I can now handle situations a bit better because I’m a more assertive person. I’m starting to feel more like the person that I want to be.”