There are loads of websites which claim to offer advice about bankruptcy but you need to take care because some of them are from commercial firms who're only after your money.
The official site is that of the Insolvency Service. It's the best place for the information you need. Here's the page with all the relevant links:
http://www.insolvency.gov.uk/bankruptcy/whatis bankruptcy.htm
However, you might also want to check out their information on alternatives to bankruptcy:
http://www.insolvency.gov.uk/bankruptcy/altern ativestobankruptcy.htm
For general debt advice, I recommend the services of the Consumer Credit Counselling Service (which is a charity, not a money-grabbing business):
http://www.cccs.co.uk/
Chris