Hi thank you for your reply.
In summary, despite that is has been two years - they are fine to still hold our details under the Data Protection Act 1998, and thus ok to contact us?
Would you say that the fact there has been zero correspondence for over 2 years counts as sufficient proof that both parties considered the account to be closed? I'm wary about getting into a situation where it is our word against theirs. Would you advise we log this Trading Standards in any case?