Morning mate, sorry aint been on in a few days been crazy busy,
OcUK contacted me and said I can return just the pump so that makes things a little easier, one of work colleagues has just bought the exact same kit (albeit he got the 360mm version) I called into his house last night and had a listen to his, his is virtually silent apart from a slight hum to the pump so there is something definitely wrong with mine.
I'm tempted to just rip the whole lot out and send it back and go with the pump/res combo then just buy the 240mm rad, I could even leave the 240mm rad in my case and just have ocuk bill me for a 240mm rad, they sell the exact same rad which is currently on sale so cant see why they cant just put one of those into the kit I send back to make up the same bundle I bought.
Will have a go at bleeding it today, that'll be fun lol.