Have you checked out the other downsides of bankruptcy?
If you own a house, you lose it. Maybe not now, but when you come to sell it, or at any time the trustees of the bankruptcy decide, they can take the cash. A lot of people in negative equity went bankrupt during the last crash, but their houses were not worth reposseing as the mortage lender had first call on the cash. Now that housing prices have reached very high levels, these houses are being repossesed.
The only thing you will be left with, officially are clothes, and "tools of the trade", this will not generally include your car, so you lose that.
seven years before a bank will consider ginving you a mortage.
You are not allowed debt over, I believe £50.
This may not arrise, but a relative is a personell manager for 1000 people and the firm pays a bonus to staff in March, bankrupts do not recieve this and it goes to the trustees of the bankruptcy, as it does not constitute normal salary.