I love Gillian too, she's my favourite character. She has 'something' (and I don't mean something she caught from one of her gentleman callers), she always has my attention during her scenes. The promiscuity is linked with her insecurity. I wonder what it will take to make her feel secure though.
By the way - she definitely DID murder her husband. She told Caroline when they were drunk. She didn't 'help him' die, she cracked him on the head with the log splitter herself, it wasn't suicide.
Also, Gillian says in series one (I've been binge watching so it's all fresh in my mind) that the farm is hers, it's nothing to do with her dad Alan. She said she always wanted to be a farmer, so she and her ex bought the place.
I haven't enjoyed Series 3 as much as the first two. There hasn't been much to enjoy about it! I hate that they killed off Kate. It was just so predictable - a nice person, lesbian, her only dream is to be a mother - of course she had to die, ooh so tragic! I also hate it when they keep the 'dead person' around in someones imagination. If you don't want to let the actor go, you shouldn't have bumped their character off. I think it shows a lack of confidence in the plot.
I really hope Series 4 goes back to the brilliance of the first series. But the way things are going we may be in for plane crashes and alien invasions. (But as long as they take mardybum Celia away with them I can live with that.)