Bloody Hell - sorry to hear this Daryl: my sympathies.
1. What they all said: get a good lawyer who specialises in this kind of stuff.
2. It may be hard, but however you feel, try not to do or say anything vindictive, spiteful or mean, even if provoked. Two reasons: a) if a reconcilliation is possible/desirable, then this makes it easier, b) if a split is inevitable, then you have the moral and legal high ground. If somebody else ends up assessing your affairs, then the fact that you've been reasonable and civilised will count in your favour.