Act 2 Scene 15

Question 1

Kitty:

Oh, Albus!

Answer 1

Do you know specifically where she is now?

Question 2

Scorpius (harry or phoebe):

She’s disappeared.

Answer 2

Time is of the essence. We need to get people into position. She could be coming from any direction. So we need somewhere that gives us good views of the town - and will, most importantly, keep us hidden, because we cannot risk being seen.
I’d say St. Jerome’s Church ticks all those boxes.