As I indicated in an earlier post the nose-in parking issue has slightly diminished due to the ICAO reduction of a Code 3/4 instrument runway strip from 150 to 140 metres, therein resulting in a displacement east of the origin of the 1:7 Transitional Surface (aka sideslope) which causes the limitations on tallfin height.
Assuming that the runway extension planning application is successful and we would then be looking at the A320 as a common visitor, moving away from nose in parking on Stands 7-14 (Stand 6 not possible to modify) would result in a loss of at least three Stands (two or more between 7-12 and one between 13-14). IMHO not worth it unless all schedules are to be operated by A320 or something with a similar fuselage length/wingspan.
As discussed on the Southampton-2 thread either consolidation of Stands 1-5 or placement of intermediate Stands (1A-4A) can provide four A320 compliant nose-in Stands. As mentioned earlier Stand 6 cannot be modified, due to proximity of baggage make-up area, Stands 7-14 are problematical as they are narrow and short (width circa 33M and length 34M), and as previously mentioned in an earlier post the apron bearing strength is less than 1-5 which may/may not be a problem.
Assuming that the bearing strength is not a problem for 7-12 if the boundary fence is moved back into the car park where currently hire cars are parked it could be possible to provide an A320 compliant Stand (11A?) albeit resulting in a temporary loss of one Stand when being used.
Similarly, assuming that bearing strength is not a problem, with modification of the boundary fence and minor taxiway modification an intermediate A320 compliant A320 nose-in Stand 13A could be possible.
Longer term if demand requires, by removal of the current (or previous?) Cargo Building, diversion of the landside road leading to Long Term parking and removal of the Fuel Depot buildings to the north side of the Depot could provide space to accomodate A320 compliant nose-in Stands 13/14/15?