Google is seeing them as two different sites (actuially one is really a subdomain of the other, but I am technically chanllenged enough to not remeber which is which :-)
Normally, Google sorts this and sees them as one site, but I have seen a number of reports lately of this happening to several sites.
Hopefully Google will work it out (it has normally done so in the past), but best advice I have seen is to get the host to set up a permanent 301 redirect from
http://dragonsi.co.uk to
http://dragonsi.co.uk
CBP