I take it they have a CCJ and you haven't been able to keep up the payments speciifed in the order. If that is the case, you can go back to Court and ask for the order to be varied. Ask the Court office how to go about this.
However, meanwhile the bank can (& presumably has) instruct bailiffs. The important thing is that they have no power to enter your home when they first come unless they can get in through an open door or window. They cannot force their way in. (Once they have been in, they can enter by force if they need to when they return.) However, they can take goods which are in the open or in unlocked garage or shed etc., so if your car is not in a locked garage try to keep it somewhere away from the house. They can only take goods belonging to the debtor so if you have a partner and the debt is in your sole name they cannot take whatever belongs to your partner. Bailiffs are not too careful about this and you would need evidence of who owned what. They cannot "empty your house" - they have to leave basic essentials of living. Trawl Google for sites giving info on bailiffs powers.
The bank can get a charging order on the house (if you have defaulted on a CCJ) to secure their debt, and apply for an order for sale. It is then up to the Court to decide whether to order a sale.
sara's post refs. to bankruptcy, which could be an option for you but depends on your circumstances.