You cannot delete your account yourself. Ask the staff using this form: http://www.digitalspy.co.uk/contact/index.php?contact_type=forum – if they comply and what happens to your old posts remains to be seen, though.
URLS:
http://digitalspy.com
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.