Even with a High Court warrant bailiffs can only enter premises if they were specifically invited in. Are you sure your wife didn't answer the door and let them enter? If not you may have an action against them for breaking and entering and your aggression with the bat was simply intended to protect your wife and property from intruders. Personally I don't think there is anything to worry about here. It was their mistake and how were you to know the bailiffs were who they said they were. If they want to take this further threaten them with a counter suit. Remember, had it not been for their mistake, this would never have happened.

I would try and forget out it but if you hear anything else seek legal advice which is normally free for a first consultation.