A2 - which bike - advice please?

You don't say what your budget is, as this will have the biggest impact in what you can buy. From what I can gather you will not go far wrong with a Street Triple, the Speed Triple can be a bit of an animal and possibly not for a novice, you could even look at the slightly older Triumph Speed Four, the Kawasaki Z750 gets a reasonable write up, there are so many nakeds out there that all do a good job it'll come down to what you like the look of, just get out there swing your leg over a few and see what feels comfortable, probably most important is try and get a test ride,