Astir8 I have nearly hit gliders round there twice while IFR in a CAT machine.
Its class E+ nothing stopping you going in it. Just you have to have a transponder so the CAT aircraft TCAS systems will avoid you. Its for your own good as well as everyone else.
And all IFR traffic used to be forced over to the west up it to get them out of Taysector. Trust me I have had enough attempts to get TALLA Angus DCT INV and got punted over to Foyle like it or not. Hundreds of tons of Jet A wasted over the years.
http://www.caa.co.uk/docs/2111/20140...tter_FINAL.pdf
Don't know if you have seen that as well.
That document you have provided is Flight planned levels.
At 30 miles out in that position looking for a 3 deg descent in for 05 you would expect to be about 9000ft. At 250knots they may go low to give them a bit of room to bleed off the speed. But the procedural arrival from the south has the traffic at not below 5.8k before 25 miles and then drops it on 3 step downs after that.
So there will be some pan ops procedural approach bollocks involved in that bit being asked for.
If they are using 23 I agree they will be way higher above FL135