Don't tell absolutely anything to the children until you know exactly what will happen next (ie. where the other parent will live, when and for how long contact will take place, whether they will have a room in the other house, etc.). Uncertainity is not good for the children, avoid it as much as you can.
I will be moving, first to my parents for a few weeks to get myself sorted,then to my own place of some kind.
We need to get out of the tenancy here somehow.
If I start my own claims for tax credits etc, then what do I do about this house? I think I could afford to pay half the rent on this house for a short while if need be, from what I think I'll get benefits wise, but it would be very tight.
Hoping staying at my parents will give me breathing space to sort out benefits etc. obviously I can't claim housing benefit there, but I'm pretty sure my parents will only want minimum rent from me, and I should be able to find a house in that town fairly easily.