Ok, I think this is the one, there might need to be some tweeking after I've made the textures but overall it's nearly there.
I felt that it was way too bright on Harry so I've moved the light so it's coming from behind more and making it more the same colour as the sky.
Today I found the perfect HDR image and backplate online for free. This is my first lighting test.
Here I've added a yellow rim light to simulate the yellow sun shining from behind.