As a correspobdent has pointed out: if you are not on an electoral roll it can stop you getting credit for things as simple as changing phone or broadband suppliers to getting a mortgage.

If you are not yet registered to vote you can do this with a “one stop” registration direct with the Electoral Commission:

https://www.gov.uk/register-to-vote

With the swing to minority parties such as UKIP and to Independent candidates your vote could make all the difference to election results in East Devon.