Sorry Heathrow Director, been a tad busy,
Increased monitoring - refers to surveillance of the two arrivals streams to ensure separation is maintained and any blunders off are caught asap. There's a techy radar word which eludes me at the moment.
Trajectory Management - a new buzz phrase coming out of SESAR to denote the 4D control of flights. e.g. only push and start when the whole route is coordinated. Used to be called gate to gate but is now viewed as en-route to en-route.
Hope this helps.
Sir George Cayley