Whilst this web server works well locally (i.e. within the building) it appears to place a strain on the web server when accessed via the internet causing "Server Busy" messages. This is probably caused by the fact that to provide a uniform looking site, the blog and the forum were both merged. The blog would appear inside the forum as a window.
To relieve the strain these have now been (temporarily) separated from each other to see if this cures the problem of accessing the site remotely. It is a rather complex process and so visitors/users of the site may experience a few error messages until the new system has been thoroughly tested and debugged or reverted back to the way it was originally.