It's only been a few hours (4 I guess) but she is still young (7 months) so normally only stays in the garden for a few minutes.
She's just vanished, have called her but no sign.
I know its not been long but I feel all sicky, and needed to offload 
I've gone and taken her collar off as well (she is microchipped though) because it had a bell on it, and she couldn't creep around un-noticed by DS.
All the gardens along here are small and low fenced, I've searched along them but she's not there.