Sir: I have had similar experiences with charities to that of N E I McNeill (letter, 8 June). The charities I support are also covered by covenants and I am not extending my list. I have written to each charity I support saying that, if appeals are repeated, I will cancel my covenant. I have also registered with the Mailing Preference Service, which ensures that unwanted appeals from charities and organisations sending advertising or promotion material are not sent to me. Their telephone number is 0171 766 4410. I think British Telecom have a similar system.
Moor Park, Middlesex