Thanks Snifter, I appreciate your response. I see what you mean about it being a problem if a party is away and no contact is maintained throughout. I don't think we will have a problem in that area, so that's good to know.
Thanks for the advice about the stat decs, we have quite a few Australian friends who will be able to verify that we socialise together with and without friends when he is home from work, so that's good news.
I will definitely be able to get a record of us calling each other. I think the thing is, we genuinely talk, message, chat on Skype etc. a lot when he is away so I'm sure providing evidence of all of that will not be hard. It's just knowing exactly what evidence to submit!
Your advice has been super helpful thank you.