The best way to comment on a blog post or to contact me for any other reason is to email me.
My contact form has been letting too much spam through, so I will have to ask you to do some creative typing: email me at malcolm_tatt*hotmail_com by replacing the underscores with dots and the asterisk with the familiar @ symbol.
If you are submitting a Comment as such, I will add your email as a Comment on the post (unless you ask me not to, of course). Some time I will find a better way of dealing with the problem. Until then, please accept my apologies.