The problem I think Derren is alluding to, is the fact that the London Office is actually a keep, located on an 'invisible' island on the Thames. There is only one entrance if people do not use the shade gates within, and that is via the front - which is currently being amassed by hundreds/thousands of kamikaze werewolves. Attempts to get in like the three infiltrator wolves did without powerful wards/magic/all the bad ass shit they have, will wind up with the being tossed into the Thames (at best) or disintegrated (at worst).

You were meant to bring Aoife in yesterday, before the attack I thought?