Heathrow sets flightpaths for early morning planes - Transport - News - London Evening Standard
More details have been published re the no-fly zones.
For each of the runway directions there are two pairs of zones, each one 5nm x 1nm, aligned E-W and offset to the N and S of the localiser.
The inner zones start at 15nm from the threshold and extend to 10 DME; the outer zones are from 20 to 15 DME.
Traffic joining the ILS is not permitted to fly through these zones, with the inners and outers active on alternate weeks.
No details yet on how compliance is being monitored (presumably via ANOMS) or whether performance stats will be published.