The house belongs to your son. Ex owners have nothing to do with you. As the property belongs to you (or your son) you could break a window to gain access. And then bill the people who, illegally, changed the locks. How did they gain access? The bailiffs' problems are with the previous owners, not with yourselves. Why didn't your solicitors know about the previous problems? Any charge on the property should have been discharged when the sale (to you) was completed. Get access to YOUR property, chase YOUR solicitors for explanation and, possibly, compensation - if they've not done their job properly. The bailiffs have no reason to harass you. Have they been notified of the sale of the property? I suspect that the bailiffs are 'private' and not Court bailiffs. If anything from the property has been removed SINCE completion then this is totally illegal and you need to refer to your own Solicitors. Although, judging from your original post, they don't appear to know what, exactly, they are doing. Good Luck!