Monday 29 June 2015 8.38am
No one can fine you for not registering to vote
Ivanhoe, with respect, that is totally wrong.
If the electoral authority issues a requirement to register - which it sounds like is the case here - then you are compelled to register. Failure so to do is punishable by a fine up to £1,000 (a civil fine as opposed to a criminal one) - see section 5(4) of the Electoral Registration and Administration Act 2013 (which amends the Representation of the People Act 1983) - see here.
Advice to the OP is to comply with the request and duly register. If you are concerned about data protection etc, you can ask to be included only on the full register and have your details omitted from the edited register (the version that is commonly sold to marketing companies).