Eeh, I've done Derby the last three seasons. Only so many Saturdays I can get away with being out of the house so skipping it this time. Straight swap for a ground, and city, I've never been to.
Trainline says £318 for three people leaving Brighton at 7(ish) and arriving at 12.50(ish) then leaving Newcastle at 18.30(ish) and arriving back in Brighton at midnight(ish).
But, yes, I'm waiting to see if it gets moved first. I'm still going. But I'm not booking early.