The telephone call is optional extra. You don’t have to have it.
We can carry on corresponding on here. You pay one fee for the total exchange, not per reply
You are not responsible for the mortgage or the bills other rental of a house that you do not live in although you remain liable to any lender or landlord if he remains in the property and stopped paying although you have the right to recover that money from him within the break down of the eventual financial settlement as part of any divorce or legal separation.
If you have a 12-year-old child, then whoever gets the right to live in the house will depend on who has care of that child. If the child is living with you, and you fear domestic violence and particularly if there has been a history of the same, you can apply to court to get a non-molestation order to stop him coming within 100 m of you and allow you to move back into the house.
In respect of Thames Water, make sure that you follow everything up in writing.
Unless a sale of the house would provide enough money to provide a whole for the parent who is caring for the child and give the other spouse some money, then a sale of the house is not on the cards until the child reaches 18.
Can I clarify anything else for you?