It would appear that Blue Islands have now dropped their plans to serve Dublin and Manchester from Southampton. Source: SeanM1997 on a certain social media site...
Maybe Eastern will be as to increase their frequencies on these routes as the year goes on, but I'm not particularly sure if they have the aircraft to do so unless the E190 starts getting used for more scheduled services, as one of the ATR has gone to Newquay for the Gatwick PSO.