After telling him in no uncertain terms that I wasn't interested, I decided to do a bit of internet research about them and wine dealing in general, which led me to your blog. There, I found your post dated 7th Jan 2010 entitled "Checking a company out". I followed the advice in that post, and here are the results:
Registration number: 07178818 (which matches that given on their website)
Their filings are up to date, but their history contains a notice for compulsory strike-off in Dec 2013, which was discontinued a few weeks later. (*As an aside, it seems that Companies House no longer charge for the company's accounts and returns documents, as your "checking a company out" blog entry states).
No for me thanks Enzo Giannotta!