Can I play "Heaven's Feel" if I haven't finished UBW yrt?

I'm listening to UBW route (however strange it may seem). One really cool youtuber records it, check his channel - KaptainKaos.

Anyways, I just got my copy of F/SN RN, and I'd like to start Heaven's Feel now. I know it's basically a completely different timeline, but I want to make sure anyway. Does HF contain any spoilers from last few days of UBW? (negotiations with Ilya and berserker and further). If not, will it in some way affect my enoyment of HF?

Thanks!