The first place to look is the "Air Operator's Certificate" which will be issued by the LBA if your operation is approved by them. This will refer to the "Operations Specifications" which is an attachment to the AOC. The Ops Spec should include the aircraft model and the area of operations permitted. the area of ops should include a list the geographical area(s) of authorized operation (by geographical coordinates or specific routes, flight information region or national or regional boundaries).