Hello Toby,
I think that you had a change of mind somewhere along the line in your planning.
whois shows your details correctly for the .com registration, but for the .co,uk, I feel that you need to correct your registration. I believe that the option to have your address omitted is only available to non-trading individuals.
Registrant's address:
The registrant is a non-trading individual who has opted to have their
address omitted from the WHOIS service.
Might I recommend to you the National Business to Business Centre, located at Warwick University nb2bc. co.uk who's website will give you a lot of information about running your business on line, including the relevant regulations that are required in the UK. Their services are free and well worth a look.
I'm sorry that you are taking flack, but you have the remedy in your own hands. Unfortunately the certificate from Equifax isn't as transferable as you might have imagined it to be. I'm sure that this is something that you are in the process of sorting out as we speak.