Two points to add to this debate:
1) I have heard that the normally Class G areas of this zone will apparently be manned by RAF air traffickers rather than civvy (despite EGLF LARS covering most of it).
2) According to the AOPA website, after a meeting in March there was 'loose talk' of AWACS, Typhoons and Apaches being used for any unknown traffic entering the zone. If you were to fly non-squawking and unannounced, as AOPA says, brush up on your interception procedures.