SARF - You say SEN will never be busy enough for backtracking to be a problem. It could be; I remember back in the late 1960s standing at the end of the runway in Eastwoodbury Lane with the not unusual sight of up to five aircraft approaching, two on finals and three on right base. Ok, in that direction backtracking was not needed but even coming in on 24 there was no problem as they could all use Charlie being smaller planes; Viscounts, Bristol Freighters, HS748s, Carvairs etc. SEN cannot be written off as an airport that will never be that busy. Who knows what the future holds?