You've missed one @PeteXXX - the 'aaaargh' line at the end.
And the taxiway is not labelled not a runway. There was a incident last month in Thrump land of a plane trying to take off on a taxiway and stopped by the air traffic controller. Thoughts are that the approach to the runway was direct into the sun but it does raise a question over the actual markings.
Think the circle formula needs checking
Think the circle formula needs checking