Dear Sirs,
Please be advised that I am only prepared to communicate with you in writing. OFT rules and regulations clearly state that you can only visit me at my home if you make an appointment and I have no wish to make an appointment with you. There is only an implied license under English Common Law for people to be able to visit me on my property without express permission; the postman and people asking for directions etc (Armstrong v. Sheppard and Short Ltd [1959] 2 Q.B. per Lord Evershed M.R.).
Therefore take note that I revoke license under Common Law for you, or your representatives, to visit me at my property and if you persist in sending "doorstep callers" to my home, you will be reported for harassment and be liable for damages for a tort of trespass. You would also be liable for conspiring in a tort of trespass by acting in defiance of my instructions and sending someone to visit me nevertheless.
Should it be necessary, I will obtain an injunction.
Yours sincerely,