Ford Fiesta mk5 2003.
I didn't think that the details on what car would be needed. As im pretty sure this happens to lots of cars, and i thought it would be something similar between them, my bad.
I'll check plugs and check for a spark from the leads when she gets back home, and its definitely not battery, it didn't sound like it was struggling to start from that, it was happy to turn over, just wasn't happy to start haha.