Hi,
Sorry, perhaps that wasn't quite the way to word it!
I think you can opt out of the scheme provided by an employer and go for a private pension of your own choosing.
I think everyone is entitled to a state pension and it's amount depends on your NI contributions throughout your working life. I don't think it's possible to opt out of NI contributions though.
Apologies for being a bit vague, however as per my initial post, some talking with an independent advisor and a tax lawyer will be the best way to progress.
Cheers, DtM! West London & Slough UK!