EZY do not currently serve AGP or ALC from BHX so any future flights to/from SOU would have to be fitted in existing base schedules / aircraft availability
They do currently serve PMI and FAO although according to the schedules for BHX on the EZY Holidays website, not all flights to/from these airports next summer are BHX based aircraft,
This doesn't mean there will be no EZY sun flights from SOU next year but it's not as simple as the BHX base opening and aircraft therefore becoming free at PMI, AGP etc to operate to SOU.