Broken MT Update
The installation of Movable Type on this site was a couple of versions behind so last night I decided to update the site to version 4.37.
Unfortunately, while carrying out the update, I skipped a vital step. I forgot to copy over the many site specific plugins which are installed here. This meant that for approximately ten hours overnight (UK time) the site was broken and it was impossible to create new blog entries or to post comments.
I think the problem has been fixed and the site should now be back to normal.
Apologies for the problems. I'll be more careful next time.
If you see any problems with the site, please report them over on github.
 For embarrassingly large values of "couple".