The first one is perfect! Great balance between the light and shadow. The only thing that distracts me a bit is the left/bottom corner. I would either clone or crop it out
The second picture seems to be a bit too overexposed. But I understand it was difficult shot because of strong contrast between the light and shadow. In any case, the first one is definitely a winner.
Nick,
I too think that #1 is a real winner!
The sharpness and the preservation of the detail on the window glass and the repetition of the stair handrail higher up make it for me...very atmospheric!