Try eating your lunch in Trafalgar Sq and watching the BA ERJ-190s descending down Whitehall on base leg for LCY then turning final over St Martin in the Fields as a BA B744 thunders overhead going the other way joining the finals for Heathrow ! Never fails to impress, keep meaning to take the 300mm lense and try and capture both in shot, seen it but never been carrying the Nikon !