Many UK High Street banks have dedicated Phish and ID Theft reporting systems, where you can send emails you have received as attachments. There is another very useful resource at http://www.identitytheft.org.uk/ which is a UK government sponsored site. Businesses have clubbed together to provice a service at http://www.cifas.org.uk/identity_fraud as well.
http://identitytheft.org.uk/ has useful resources on identity theft for individuals and businesses. As the domain name suggests the advice is tailored for UK users but many of the principles are useful the whole world over.