The Labour Party has sent out this on line tool that will work out how many people registered to vote have the same name as you.
Check out http://
1,346 are called "John Gray" and the 2nd most common name is "John".
There is a serious point to this since nearly a million voters have dropped off the electoral list following changes by this Government.
Make sure you register to vote here https://www.gov.uk/register-to-vote