@ElChapo I think in the last month it was probably most days but only by about 10 mins or so I believe
I have interviewed/recruited hundreds (if not more) of people in the last 30 years. Here are a couple of points:
Always list previous work on a CV. If you don't, it's an unexplained gap and this always raises suspicion - unless there's a very good reason that can be evidenced (a broken leg, caring duties, etc.)
'Only' about ten minutes late. It's not 'only' ten minutes, it's not arriving on time, as expected. Being late is disrespectful to colleagues and the employer. I would not recruit someone with a history of lateness.
GCSE English. Please, please, please stress to her that she needs an English GCSE or equiv. She's 18 and so there are plenty of options available to her to obtain this. English is a gateway qualification.
Travel time. You need to help her to manage her expectations. Many of us travel 1-2 hours each way to our work. Unless you have a good reason, e.g. a disability, then she does need to be prepared to travel.
I hope it works out for her.