Im no chippy but as the boards will need to expand i would imagine it will have to be installed as a floating floor with some kind of membrane

I've just been to see a large farm house with a similar oak floor only they had UFH in the screed. Their floor was installed as a floating floor with a plastic  membrane. It's now two and a half years old and looks great.

Make really sure the concrete is really dry before you lay the floor. The test someone recommended to me is to put a rubber car mat down for a 24 hours. If there is any damp/condensation under it when you lift it the concrete isn't dry enough. I guess a damp meter would also work!