I've got an upcoming GP appointment with an FY2 doctor (so, second year out of university, first year that they can do a general practice placement). In August, so she'll have only just started the placement. According to my app they've scheduled me 30 minutes with her. My experience is that these appointments tend to be very… thorough, and by the book, as they haven't yet learnt all the shortcuts and heuristics that trained GPs have. They can also consult with one of the GPs.
To be completely honest, I'd rather see a GP than an FY2, really, as I appreciate GPs' skills as specialist generalists — people tend to think of GPs as just doctors who haven't specialised, and assume any doctor can do it, as opposed to, say, a rheumatologist or an anaesthetist who has lots of extra training. But general practice is no less a specialism than any other type of medicine, and requires particular skills and training.
Doctors need to train somehow, though, and there are safeguards built in, so it's just one of those things, and most of the time the trainee is fine, especially as they have extra time and the option to consult.