Out to the east the extra 1.5nm "shelf" from 1500ft will be helpful for the SID's of 10 and ILS to 28.
However, we have to have LCY traffic at 2000ft downwind on 10, and as there is likely to be unknown traffic there at 1500ft (assumed) then I think we will get TCAS climbs into LHR traffic descending to 3000ft on top.
TDM over to you
