If I declare myself bankrupt, will I loose my house?

There is a high chance your house will be sold.  

It is the duty of the Official Receiver to recover as much of your debt as possible and distribute fairly to your creditors.  It is likely that your house will be the biggest asset you have.

You can apply to your local authority for re-housing.

Other debt solutions are not as extreme as bankruptcy and will not put your assets at the same level of risk.