Fantastic photos. You definitely have a good eye for a photo.
If you fancy getting a "proper" camera without having to carry anything too heavy I'd recommend one of the mirrorless cameras with a "pancake" lens. I've got a Sony A6000 but I've heard good things about the Canon M100 with the 22mm lens. It will have a similar field of view to the iPhone but the quality, especially in more difficult light conditions, will be much better.
Thanks a lot Claire, much appreciated.
I've actually just bought a proper(ish) camera, a Sony NEX-6 with a nice long lens. My friend was selling it for £250, a price I couldn't resist. Complete with a proper camera bag, three memory cards, a 1tb hard drive and a few other bits.
Thought it would be silly not to.
Although now I have to learn how to use the thing. Absolute novice! I'll get there.