Change to Comment Permissions

I have changed the settings today to allow all readers to post comments and feedback. You no longer need to register to do this. I had not realised that readers needed to have a Google or Facebook account (or one of several others that I have never heard of, being internet-challenged as I am) in order to post to the blog. Hopefully this will make it easier and more attractive for participation; however I will be monitoring the posts in case we get some spammers or pests.