What journey is she doing? Would the cross-platform interchange at
Highbury & Islington help?

Without the FPK issue it would be Overground (NL Line) to Highbury &
Islington; Victoria to FPK; NR to Winchmore Hill.

I thought there was no FCC NR service from Highbury & Islington at
weekends. (I did say but should perhaps have emphasised she is
travelling tomorrow (Saturday)).
--
Robin
reply to address is (meant to be) valid