You buy a Brompton and you make it your own. You really could go around saying that there are many like it, but this one is mine. This notion of making your Brompton personal to you is definitely a thing.
Along with the Brooks B17 Titanium and copper ended Brooks leather grips I decided to get some copper/golden hinge plates.
I have to say these ones are pretty good. The come with a pair of little springs that allow the plate to push itself out and not turn around.
I don't really go in for huge amount of customisation on my Brompton bikes and prefer more subtle enhancements. These fit the bill rather nicely.