Thanks for your reply Wally.
So if yr in that hold as you mention for the instructed 20 mins then theoretically you can only stay there for 10 mins if you want to land with yr fixed res intact.
The thing I am trying to find out is 'what piece of legislation/regulation allows you to stay in the hold beyond the ten minutes?'
Could your above statement be changed to " So if yr in that hold as you mention for the instructed 20 mins then theoretically you can only stay there for 10 mins if you want to remain legal."