I am currently shortlisting MBA schools in the UK.Does anyone recommend good MBA schools preferably with a technology major.I have 4 yrs of work ex with EY BAS

Wow, its 10am already and no one has started the BAS bashing yet. I'm truly amazed. Re your question, I would have thought that you should select your MBA school based on where you want to go, not on where you have already been. If you want to join MBB on the back of your MBA, then it is irrelevant whether the MBA you go for suits your technology background. So in typical consultant fashion, instead of answering your question (since I don't know the answer), I'm telling you I think you're asking the wrong question.

LBS is your best shot. Maybe Oxford or Cambridge if you only have a year to play with. Depends what you want to do though. The latter 2 will be fine for some jobs whereas for others you'll really need the LBS brand name given your background.