That Cube looks pretty good (is it the one with XO1 Der, Magura brakes etc?) But no dropper post so that will add to the cost if/when you get one for it.
100mm and ~67° HTA has a few options in the Epic, Blur, Merida 96
It’s a great time to be choosing an XC bike in terms of how good the bikes are. I don’t know what it’s like in the UK, but it might come down to what bike you can actually land.