what does it mean and should you do it?
It's been a longtime since I worked as a financial consultant so not sure what changes have happened with regards to pensions.
Is your company got it's own pension scheme
, if it has it may be offering you the option to join it or "opt out" and make your own pensions arrangements. The next question is it a final salary scheme or is it money purchase scheme. The old rule was if it's a final salary scheme you are better joining that scheme, infact advisors could not advise against joining a final salary scheme and would be fined if they did. This may have however changed as fewer final salary schemes exist these days.
Alternatively "contract out" my just refer to what use to be called SERPS and is a nominal amount of NI contributions that you can either invest yourself or goes towards your state pension.
Need much more info before stating "contract out or in" and advise seeking advise from a professional consultant. Another factor is do you see yourself staying with this company longterm
.