I partly responded to this on ATSA post.
New levels are associated with Cardiff s delegated function.
The levels are permenant and likewise inbound levels have changed to
From EXMOR and TALGA they are FL160
From AMMAN Fl170
Also Cardiffs responsibility has extended as far south now as overhead Exeter Airfield and upto 5 miles north of TALGA so quite an expansion.
Listen out in a few months to yet more changes to procedures for Bristols and Cardiffs traffic !!!!