It was a bit unnerving a few minutes ago when a chinook started hovering low over Vauxhall, normally they just fly through the area. Fortunately no one started fast roping out of it and it went after a bit.
68. Right-Hand Traffic Rule. The handling pilot of an aircraft which is flying within
the UK in sight of the ground and following a road, railway, canal or coastline, or any
other landmarks, is recommended to keep such a line of landmarks on his left, except
where promulgated locally or when acting upon instructions given by the appropriate