BOAC - No worries, what's a few feet between friends? My intention was to point out that it appears that the logic in the autothrottle computer differs between single and dual channel A/P operation. Since we have been told that the CMD B was engaged and so far there is no mention of the DFCS being in the flare mode, I am assuming that the autothrottle computer treats a single channel A/P approach just like the DFCS is disengaged; i.e. the A/T goes into flare retard at 27' RA (there's the number you have) if on glideslope in MCP SPD mode and flaps are more than 12.5 degrees.