Im thinking white sussex and its a rooster

[ManyQuestions]

Thanks guys!

I'm leaning towards coronation sussex from your suggestions, purely because the tail feathers arent fully black, only partial. Also the neck feathers arent white like the rest, they seem to be slightly more yellow/tan.....only very slightly, but its noticable.

And as for being a roo, well compared to my RIR ladies, hes a fair bit taller and bigger bodied, plus hes got the tail feathers.