Well, I didn't have a laundry list, but I did have a few niggling issues (ie Vitamin D deficiency, allergies, issues with birth control), and I just walked in with my medical history and had a chat. He grumbled a bit about vitamin D being the "new thing" people test for, but as I am actually properly low (and have a family history of issues), he was happy enough to run another test for me and give me advice.
We don't really have regular checkups the same way; people tend to stay away unless they have a chronic issue or are ill. For the chronic issue, you will usually end up with regular appointments, sometimes with a GP (where appropriate) or they may refer you to a specialist. For birth control and pap smears, for example, I tend to go to one particular sister at my practice (as she is awesome) or the local sexual health clinic (if she is busy) as they are also awesome. I don't actually need a referral for that as they are expected (and, with regards to the pap smears, the NHS will send you lots of letters until you get one done. They are very on the ball about that.)
I think if you come in with the information, and then listen to what your GP says, you will be off to a good start. Let them double check things if they need to. (The reason mine ran another scan for Vitamin D was he wanted to check that a) the US was using the same scale to measure it and B) to see if I was affected by the move to Manchester from San Diego) Remember, you aren't "stuck", you could always try a different practice (or just find someone else at the same one). They may have perfectly understandable reasons for the differences (I believe there is some concern with the efficacy of detection with mammograms depending on the age of the woman, for example, and sometimes there are slightly different drugs available). You may need to advocate for yourself, but I always found it best to remember that this system is built on providing what people NEED and not necessarily on trying a number of tests to see what might be going on, maybe. This doesn't mean that it is all perfect, there are rubbish and obstructive GPs out there, but I think if you are comfortable advocating for yourself and come armed with your medical history, you are in good shape.