You can opt-out of the Scheme if you give the Trustee one month written notice. 

Please consider the benefits you will be giving up very carefully before deciding to opt-out, particularly if you have dependants. We would suggest that you take independent financial advice before making a decision. 

If you do opt-out you will need to consider alternative options for your retirement.
Should you decide to opt-out you will be entitled to the same benefits from the Scheme as if you had left employment at the date of opting out.

Once you have opted-out, you will not be able to rejoin the Scheme.