For anyone who's interested. I've just committed to a :
2017 Focus Cayo Ultegra.
Purchased without wheels so instead of £2000 iv'e had it for £1650 and will put my campagnolo zonda wheels on.
Estimated weight will be around 7.5kg
Decent finishing kit too from fizik and FSA.
https://www.focus-bikes.com/gb_en/23567-cayo-ultegra.html
The only other close competitor was a canyon ultimate and a 105 equipped Scott addict, both would of been around £2000