Being "in the top 50" basically means 46th - 50th. Otherwise you:d be in the top 45 or whatever.
And I for one am glad Doc Stock has shaken the dust of that place off her feet and I hope her career trajectory is meteoric from here on.
I have her book - bought it after hearing her speak on R4 - and I've read it and what's more, I can confidently state she is no transphobe but a very compassionate and respectful human being.
This is Sussex's loss. What academic worthy of the name will want to work there now?