Interview outfit help!

[Happyface120]

I have an interview next week for a non-clinical NHS job (Band 8a if that matters) and I have absolutely no idea what to wear!
I've been in a clinical post for a long time, and all my interviews in the last 10 years have been within my own trust, with the expectation of uniform to be worn for interviews.

I'm 5'6", size 12 with a budget of around £100 (excluding footwear). Outside of work I live in sports kit and jeans, so have absolutely no formal wear
Help please 😂

I’m non clinical nhs and where I work has become far more casual since covid. I would be shocked if a woman turned up in a formal black suit for an interview these days but I’d still want to see some effort. I haven’t interviewed in ages but for meetings with senior stakeholders I wear a blazer with a simple dress or trousers. If you find a blazer/jacket you like and use most of your budget for that then cheaper trousers and a simple top or dress can be added