Hi Kate,
On my 1st appointment, he did Ultrasound to confirm the previous diagnosis that my previous gynaes had. Then, he explained the plans (plan A-C) that he has. For my case, he asked me to do Plan A first (intercourse + gonal f injections + chlomid). I failed that, and he advised me to do SO-IUI (plan B), but I decided to go straight for IVF (plan C), mainly b/c I had done 3 IUI/SO-IUI @ TMC before I went to see Dr Charles.
I think whether he'll advise you to take which plan depends on your conditions.
I spent quite a while talking to him on the first appointment. I also emailed him a few more questions after that appt. He usually replies within 1-2 working days. He's also easily contacted via phone.