Hi
Can't see the loads, but according to EF the 173 looks busy
BA 173 0 LHR
30/06/17 11:20 JFK
30/06/17 14:05 744
F3 A2 J9 C0 D0 R0 I0 W9 E6 T0 Y6 B3 H0 K0 M0 L0 V0 S0 N0 Q0 O0 G0
Sorry to say the 831 looks worse
BA 831 0 DUB
30/06/17 7:30 LHR
30/06/17 9:10 319
J1 C0 D0 R0 I0 Y4 B0 H0 K0 M0 L0 V0 N0 Q0 O0 S0 G0
Good luck!