Head to your local council office. They will have the full electoral roll but this should also indicate which names also appear in the edited roll. If in doubt, contact the electoral registration officer for your area. (Phone your council . They can give you the contact details).
Note that, if you live outside of a metropolitan area, the 'council' referred to, above, is your district (or borough) council and not the county council.
The electoral roll is a bit like the telephone directory. If you suddenly decide to go ex-directory, you can't expect BT to reprint the entire directory (and withdraw all existing copies). You have to wait for the next edition to be printed before your name is removed. The same applies to the electoral roll. If your name is already shown on the edited roll, you can't do anything about it until the next registration form drops through your door.
Chris