Thanks for your reply.
You can probably appeal the decision not to renew your wife's visitor's visa, citing the continuing coroner's case with your son, before the decision is made on your appeal she will have a right to remain (her visa in effect will continue until a decision is made.
In order to claim asylum and to be recognised as a refugee you must have left your own country and be unable to go back because you have a well-founded fear that you will be persucted on the grounds of your race, religion, nationality, policital opinion or membership of a polticial group. It is very difficult and fewer than 20% of people that apply are actually granted asylum.
If you wish to attempt to seek to claim asylum then you will have to the asylum screening unit in Croydon (south london) and make your appcliation there. The application process would then begin. You would also need to bring your dependnent with you that you wish to be part of the asylum application and you would also need to take:-
1. Your passports
2. Police Registration Certificate (if you have one)
3. Other identification documents (eg. identity cards, birth certificates)
4. Four separated passport photos of you and your dependents
5. Evidence of your accomodation
6.Any other supporting documenst you wish to include with your application (eg. statesments outling why you are in fear of being persucted.
The difficulty is that simply family problems usually fall short of a form of persuction and you would have to demostrate that you have a well founded fear that you would suffer perscution by your family. If you cannot do this then your asylum application is not likely to be successful I'm afraid
Once a case is started they aim to come to a decision within 6 months, so it could buy you some time but that may be all it does for you.
It's a hugely difficult situation and you have my sympathies.