Style me interview style

[Lifesingflowers]

I have an interview coming, and I flopped my last few. I feel like I have been dressing quite mumsy, as I don't feel confident in my body. I'm a size 12/14 trousers and size 12 top. My belly sticks out after having two babies so don't feel confident about my body. Can you please recommend me some clothes and some suggestions. I really want to be look professional and confident

Congratulations! How exciting. What industry?what’s the role?
Presumably in person?

It's administrator role for nhs

Ok,so wear Smartish dress or trouser & top. Think Next, Zara, H&M
There is No expectation of corporate smart or power dressing, just smart casual really