HT to Information Rights & Wrongs @bainesy1969 for the detailed information so I was able to write the following email of complaint to the Information Commissioner:
None of the advice provided on your website applies to the complaint I wish to make:
The complaint concerns the UK Labour Party using the birthday of the NHS as a cover to gather data by getting Facebook Users to complete personal information so that users can be told which number they were out of the 44 million that have been born since its formation.
The Facebook link is as follows
I believe that this action is in breach of the The Privacy and Electronic Communications (EC Directive) Regulations 2003 (PECR), because the information will be used for unsolicited electronic marketing on behalf of the Labour Party in the run up to the General Election 2015.
I will publish the response as soon as I receive it.