I and my wife will come to London from Feb 2012 on PSW visa. At that time, she will be pregnancy about 10 months.
Before that, I lived in Leeds, full-time working, then quit that job ( that job was not related to my degree- not the job I want), went back to my home-country, get married to my wife and she get pregnancy

So, I plan to move to London to look for the job I like when I and my wife come back to UK.
My concern is that Can my wife register in NHS in London and get free service for pregnant there ? As At that time, I might not in employment but before that, I have paid taxes for my previous job and already registered NHS for my self in Leeds ( I come to UK just want to work not only for get free service).
I know NHS might ask for proof of Employment, but can I proved my recent pay slip in Oct, Sep, Aug 2011 before I quit my last job ? Do NHS in London ask for proof of employment or just passport or something in process of registering NHS there ?
I am very concerned for my wife's health when she get there.
Highly appreciate all your answers.