The staff bus will only run from the station for at least the next 2 days from what I have heard today. This is not the decision of MAPlc but the advice which has been given and enforced by special branch. Why there are cars being permitted into the ground level drop off area in T1 I do not know but this is clearly a break down in communications somewhere.
The roads directly outside T2 have been closed to all vehicles since Saturday evening and black cabs & private hire have been using the bowling green car park. Car park shuttle buses and hotel courtesy buses are using the station.
Not an ideal situation for both staff and passengers but one I believe is neccessary in the current climate. Give it a few days and, unless anything else happens in the meantime, it will all calm down and services should start returning to normal.