120.4 I think I may have been on finals when this incident happened. The heavy had slowed early and the A/C behind was a 319 which as you said can be difficult to slow down. I overhead you tell them they were doing 180kts to which they replied "we're trying" . As the heavy was mainly at fault why did the tower controller make a smart comment upon landing and roll out to A-10 (A/C behind still 700' agl) "are you having speed control problems" to the 319? Controllers concern is always appreciated but this appeared to be somewhat of a smarmy comment.
Of course runway occupancy should be kept minimal but good SA is also paramount to operations. There isn't always a need to vacate at A9 or earlier so why imply the AC should have vacated earlier. 700' agl leaves plenty of time. By rolling to A10 brake wear is reduced and passenger discomfort is kept to minimum. I hope I have got the wrong end of the stick as Heathrow controllers are always professional and don't resort to being facetious or condescending. If the controller was annoyed then he should have said so. Aside from this keep up the good work.
