sorry to hear about your gf's visa refusal dave, I feel for you. As many here have said, visitors visa is quite a 'lottery' to obtain but atleast you tried. It is wise to collect evidence now for future references as proof of the genuine relationship, please take note that your recent visa refusal won't affect your future application as every visa application should by based on its own merits. And yes you have to be honest with the next application, please don't omit to put the recent refusal.
Nevertheless, I hope you will have a great holiday ahead with your loved one despite of the trials. Godbless!
