As previously stated, the edited roll probably won't help much because most people tick the box, on the electoral registration form, to remove their name from the edited roll. (If you want to check it, you can either pay for credits at 192.com or see if your local library keeps the UK Info Disk, which has the same information).
The full roll, in electronic form, is not available to the general public. You can only consult the printed version and that's only available locally. (The Data Protection Act prevents it from being made available online or on CD but the Representation of the People Act requires that local people can check that their name appears on the register of voters). You will only be able to obtain the information you require if either:
(a) you can get someone to visit the local library or council offices ; or
(b) you can contact the local library (or council office) and persuade them to post you a photocopy of the relevant page of the full electoral roll.
With regard to (b), I'm not sure how the Data Protection Act and the Copyright Act affect your chances of getting a library to send you a photocopy of a single page of the electoral roll but you could try phoning the local library and asking whether they'll send you the relevant page if you provide them with a stamped, self-addressed envelope and the money to pay for a photocopy.
To do that, you'll need the address and phone number of the relevant library. See here:
http://os.essexcc.gov.uk/libraries/library/
Chris