Click here for the java chat requestor.

  Java chat app will take 5 seconds or more to appear depending on your
  connection speed. If you're on dial-up modem this requestor may take a
  little longer, but should not take any longer than 2 minutes to appear.

  If a requestor does not appear, you may need to adjust your browser
  settings so this site can be trusted.

  To do this using Internet Explorer, select 'Tools' from the menu bar. Then
  select 'Internet options'. In internet options you will need to go to the tab
  'Security'. There you will find a green icon with 'trusted sites'.

  Click on 'trusted sites'. Then press the sites button on the right where it
  says 'add this website to the zone'.

  Type in the box: https://www.ukscifi.net and then press ok.
  Then ok again to close the window.

  The java chat requestor will now appear without a problem.