I've reposted yesterday morning's DFID post as the comment facility, for some unknown reason, was missing. It wasn't until later in the day when I checked emails and Twitter that I was aware of the problem, thanks to some kind readers. After spending what seemed forever on the Blogger help forums, I decided the only solution was to cut and paste it into a new post and leave the timing as it was.
My apologies. If anyone understands why the comment facility in one post disappeared I'd be grateful if they could explain. Until then I'll stick with my own diagnosis. Gremlins.