I'll be sitting. I'll be focusing.
In HFT, the gun's butt can touch the ground, but the shooter's butt(ocks) must not.
In FT, the shooter's butt(ocks) can touch the ground, but the gun's butt must not.
HFT does not allow sitting and encourages prone.
FT allows sitting and discourages prone.
I'd change a few things for UKHFT. The bubble level would not be allowed. The sidewheel that I have is small, but I'd get rid of that too since it could not be used.