Talked her out of a sub-£300 entry level "road bike" and now she's eyeing one of these:
https://octane-one.com/bike/gridd_flat/
I am trying to give good advice but she has not been forthcoming re: what sort of cyling she might want to do beyond "I hate walking on pavements. I just want a way to get out that doesn't involve the drudgery of walking in circles every day."!
Note: she currently runs / crossfits / goes up hills / punches stuff. So fitness not an issue, but bike fit might be if bought online without previous cycling experience...