Very slow today. 30 seconds response...
I've prodded the hosting company. Looks like response times went up ten times (or more) at around 14:30 UTC this afternoon. Looks like a database issue...
Edit: Normal performance restored about 19:00 UTC.
Edit 2: Poor performance was attributed to a major software update being rolled out across the server farm...
Very slow again this afternoon from a bit before 16:00 UTC. I've re-prodded the hosting company...