Sorry for the interruption in posting recently.
The blog was temporarily blocked by Google because they decided it was a so-called "Spam blog".
It seems they have an automated tool that searches blogs and tries to identify automated blogs being used for nefarious purposes, and their algorithm is too aggressive, and there are loads of false positives.
It is illuminating to read the Google help group, which is a forum for people with blogger problems, as this issue affects loads of people using Google Blogger.
There was one poor guy blocked at the same time as us who makes his living out of his blog, and has 400000 hits per month (which is slightly more than we get) - he was blocked. And what is so frustrating is there is no way with Blogger to get to speak, or even e-mail a human being.
Anyway, we are back, and we have resolved to migrate to Wordpress soon.