Mr Stop;
You are absolutely right about Battersea being an elevated pad with the tide out, I'm not too sure about Vanguard though. The tidal fall at Vanguard is minimal in comparison, The site is full group a for twins because unlike at Batts where a floated aircraft can request a running take off from abeam the tower, and be at VTOSS by the platform edge, Vanguard is a heli-pad in the true sense of the word. It would be an unwise pilot who tried a runner from Vanguard, the fences might ruin his whole day
