As can be seen by the comment below, this site is hosted by 000webhost. The plus side is that it is free of charge; and that’s a big plus in my book. The negative side is that the service is not particularly great, there is little or no support and they recently decided to move servers (I think) without providing an automated facility to move our websites. Their instructions were to backup our existing websites, delete them and recreate the site on the new system. I did this last Thursday (6th April).
Unfortunately, the backup procedure they suggested wasn’t the easiest to restore a WordPress site (which this is), so I’ve been struggling to bring the site back online. I think I have managed to import all the posts and comments, but some of the settings are missing. The dynamic Ordnance Survey Open Space maps I have on the site are not working either, and the new theme hasn’t been customised (and makes a mess of the image margins). I will have to fix all this at some point but I don’t have the time right now; I’m just happy that I’ve managed to get the site working at all.