Hello, my name is Tony and I can answer this for you.
It doesn't matter whether you are married or not, the bankrutpcy will only take effect against her. If you own a property together though, her trustee in bankruptcy could force you to remortgage to buy her share of the property.
Other than that, it remains her debts, not yours. Creditors cannot look to you for payment of your wife's (or wife's to be) debts.
The 12 month period will still apply whilst she is out of the country, but she may need to attend before the Official Receiver or Trustee in Bankruptcy (initially, at least, following the bankruptcy) to explain all her assets and liabilities etc.
If this answers your question, please rate the answer for me. If you would like me to clarify or add to anything I have written, if you tell me, I would be happy to do that.