Spot the difference:
(the one at the back should replace the one at the front)
Oh well, I have now ordered the right battery (I hope!), and that should arrive later in the week. On the plus side, I'm sure it's good exercise for me to be carrying blocks of lead across London. The upshot of all this is that my server is basically out of action for the time being, so I can't access my archive of files/emails. I can send/receive new emails fine, but if you emailed me before last Friday, and I haven't replied, then I won't be able to until this weekend.