Thanks for the reply,
So my best recourse is just to repeat this process with Bryan Carter and make sure I prepare a defence? The letter certainly says they have been instructed to and plan to make a claim and take it to court (though, of course, I have no idea how true that is). I'll type the body of the letter below...
We have been instructed by Fredrickson International Limited on behalf of our client, Lowell Financial Limited regarding your O2 (UK) Ltd account, to commence Legal action and issue a claim against you in the county Court in respect of this debt.
Should you fail