I don't know how this works in the UK, but personal bankruptcy still has a stigma attached. I also know that if ever happened to me, I would be extremely unlikely to ever work for a bank again.
With a limited responsibility company, if it goes bankrupt its the company and not you personally.
Any debts would only go against company accounts and not your personal bank account.
I think the judge in some cases could still hold you accountable depending on lots of factors, but for most cases the debts of the company would not go over to you (AFIK).
