Do not just ignore it, you can ruin your chances of ever getting a mortgage etc. again.
The Citizens Advice Bureau may be able to help. I'm pretty sure there is help you can get (and the current financial situation may be in your favour, although it may depend on whether you were given a loan you couldn't really pay in the first place).
When did you last ask for a restructuring of the loan? I only ask as due to the recent financial issues the banks are trying to do all they can to put themselves in a good light. If you ask to speak to the manager and say how much you can give them a month and restructure the loan to a longer period with lower repayments, they may be more amenable.. Otherwise they can demand the full amount, you won't be able to pay and you'll have to declare yourself bankrupt which costs �500 anyway! I'm sure they'd rather take your money and your interest (and have a customer) for a longer period than not actually see their money again.
Also, do you have payment protection insurance? Was just wondering if you did that there may be something there that could be done?