No one seems to have any proof of anything.
People saying Holgate has no motive to lie are wrong. The motive was to detract from him pushing a playing in to the advertising boards, so he didn't get sent off.
I don't know what happened, along with 99% of people, but without any evidence the FA should not punish either player.
Football players, lie and dive all the time. Most of the stuff on this thread is conjecture.
What should happen it that Lallana should get a ban for diving. Niasse got banned for it, which was fair, so why isn't he?