The BAF ID includes Bretonia plus every surrounding system in the ZOI. @AlphaWolf215, who leads the BAF|, told me one time that he had had a long discussion with the admins and other faction leaders whether Omega-3 was Bretonia by the rules (it is by the House laws, but that's different), or not. It was concluded that it was. According to this, BAF ships may go to Omega-7, which has sense, because Bretonia has treaties with Rheinland that make that possible. Some players tried to contest this today.
As the rules say:
"Bretonia
Sovereign House Space: New London*, Cambridge, Manchester, Newcastle, Poole
House Controlled Space: Dublin, Dundee, Leeds
House Outer Region: Chester, Edinburgh, Londonderry"
Although Omega-3 is not included here, it is here: