I had the experience of going to a locum GP with a suspect squamous cell carcinoma.
Ever since I went to a GP with blood pouring from, ah, somewhere it shouldn't and he fobbed me off, I've not really trusted GPs. Needless to say, I didn't really approve of that answer, self-referred to a handycam wielding surgeon and had the full investigation done.
His comment was: "I've cut "this" and "this" out, you're absolutely fine, if you had waited a few years, we would have had a very different conversation indeed".
YMMV.