Sorry for the recent downtime we have been having, this is down to this site actually becoming too popular, which is causing issues with our hosting provider.
We will need to look at condensing code to this site (which has taken years in the making, so this is no easy job) which should hopefully benefit the site in the long run in terms of site speed as well as code efficiency. A redesign of certain site sections may also be needed.
We may be sending out a newsletter soon informing users who we could have lost over the past day or so but for now we need to continue looking as possibilities of reducing the daily load this site causes.
For now at least, the site should stay up.