I didn't see him myself, but

I believe that today, Will Parry travelled down from Oxford to bring his subtle knife to the discreet toe-end of a cul-de-sac on Medway City Estate in order to cut a series of portals into parallel universes. I'm presuming that this was in order to let in a flood of good souls intent on STOPPING BORIS.

When I left the office this evening, the lights from The Command House were shining across the dark and heavy river and I like to think that that is where Lyra Belacqua has set up her operations centre.

Fingers crossed that the forces of good will prevail tomorrow.