SoCal has a bit of a point - but really it highlights the whole 'portacabin' mentality of 'flight training' in the UK.
Mode S - how many club aircraft have one? Less than 5%?
Oxygen? How many hours building instructors have ever been over 6000'?
Flying abroad? Unles you are on the south coast not one will have been outside of 200 miles of their home field.
The tops of clouds? Who ever goes there? (me included to be fair!)
What to call them? - never go there so no need!
Permit to fly? - what is one of those?
Minimum altitude - they should be able to answer and in the books.
So perhaps not surprising that the poster does not know the answers. Interestingly the momst experience instructor at my club only went places in the 1980s - his 'information' is truly interesting.......