Can I be arrested or imprisoned for not letting a bailiff into my house?
No. If a bailiff is accompanied by the police, they are only there to prevent a breach of the peace. You cannot be arrested for refusing to allow a bailiff into your home.
You cannot be imprisoned for not paying your debts. However, non-payment of council tax, child maintenance or magistrates court fines can lead to imprisonment if you 'wilfully refuse' to pay. This means that the magistrates must be satisfied that you have the money but choose not to pay. You should be required to attend a magistrates’ court ‘means enquiry’ hearing before this is decided. This gives you the chance to explain why you have not paid.
If a bailiff does gain peaceful entry to my house what will they do?
Once gaining entry to your home, a bailiff will usually try to find and seize any goods of value belonging to the person who owes the debt or who is named on the warrant.
Once in the house the bailiff has the right to go into all rooms and can break open any locked door or cupboard inside your house. If the bailiff gains peaceful entry s/he has the right to call again and enter even without your permission, i.e. s/he can break in and remove your goods.
Any attempt to remove a bailiff from your property once they have gained peaceful entry is assault and you could be taken to court for it.
Once in the house, a bailiff will attempt to seize your goods in order to sell them off at public auction to raise money to pay the debt that you owe. The bailiff will make clear an intention to seize various items, either verbally, or by attaching a mark to them, or by touching them. This is sometimes called levying distress or distraining upon goods.
Once the bailiff has seized goods, they have a number of options. They can either remove items they have seized immediately from the property to be stored and eventually sold at public auction. Alternatively, they can leave someone on the premises to guard the items that have been seized or, in the case of bailiffs collecting rent, secure items that have been seized in your home. These last two options are very rarely used.
The most likely outcome is that the bailiff will ask you to sign a 'walking possession agreement'.