As regards the leaving the house sitch, I think that not taking legal advice could end up being very costly for you. At least contact the Citizen's Advice bureau. I don't think having your name on the Deeds is enough. You don't want to be accused of abandonment. If your W's L is telling her not to let you back in then there must be a reason - think on that.
I think in some ways it is to soon for your W to be feeling the 'bite' of her actions. Be true to yourself and look out for you and your children.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength