We have been experiencing intermittent issues with the website over the last 24hrs. I have been advised that this has been caused by a potentially malicious hack (possibly automated but by no means certain) altering the IP address of the site at intervals.
I have asked the service provider to evaluate the security on the site and advise accordingly. In the meantime there may be limited access and fewer updates.
Please accept my apologies for this. I will advise when things are moved back to a more robust footing.