Basically the main problem is that she howls(more of a hideous gurgling really) outside all night. At first we thought it was because we have to lock the cat flap, so if she does go out at night she can't come back in. The reason we do this is because other cats were coming in at night and going through the kitchen bin and spraying.
Being locked out at night isn't the problem though because on several occasions DH has got up and let her in but by the time he gets back upstairs she is back outside and making the god awful noise again.
I worry about her too as she does not very often venture out of our garden or driveway. Even if it is raining she sits outside in the rain and doesn't find shelter. I worry that in the winter if she won't find shelter, especially at night then she might freeze to death in the wind and rain.
Is there any hope for her? Any cat behaviour experts out there to help me with this before DH murders her as he is shattered from not being able to sleep.