Thank you ChrisN but that appears to tell the aviation world virtually nothing. It is certainly a good publicity item for the general public. With such a large area of CAS in and around London and the South I was asking what the changes may mean to those who fly at the lower levels. Does anyone have any maps of the proposed changes? If you look at the PROPOSAL page B1 for example, the very crude drawing shows CAS extending well beyond the Essex coast line, effectively (without knowing the proposed vertical limits) completely bisecting the UK.