Returning back to the UK?

Hi im new here to this forum, my names hamzahz im a british national. I have a child whos 18months old and currently in Ireland doing the surinder singh route with my wife. Ive been here since Feb 11 2014. Just wana go back to the uk now. Eventho ive got a job with AIB banks call centre, it pays real good but Ireland was never gonna b permanent. Ive also been offered a job in London at a place i used to work, they can supply me with a letter to confirm.

I was wondering if im ok to go back now? Ive worked for 3weeks at tesco and now 2weeks at AIB, cant i say that i really wanna go back to my old job? Ive registerd at doctors here and made a few friends who could write letters for me to say they know me and the rest of it. Could i not apply and say tht i want to use the new case c456-12? I was told by a immigration lawyer that its worth a try.. Any advice or suggestions?