In reply to bleddynmawr:
>The police were very pleasant and treated me well but I still feel that my arrest was illegal, and unwarranted as I would have attended voluntarily to talk with them. Am I right to feel aggrieved, should i Complain or take action?
Was your arrest illegal? Maybe. It depends on exactly what your in-law might have alleged and what you were arrested for. May have some bearing if you have been bailed or told that the matter has been NFA'd or finalised.
As for unwarranted - PACE code G describes the necessity test required for arrest. I would be surprised if they haven't considered that, and the possibility of arranging a voluntary interview. My guess would be that thus appears to fall in the area of a domestic incident so they will want to take positive action and I can think of a number of Code G reasons that might apply.
If you want to complain - ask for the duty Inspector.
Should you feel aggrieved? Possibly - but shouldn't that be directed at your in-laws for making a possibly frivolous complaint, or at yourself for allowing yourself to be drawn into violence.
The cops appear to have, as is not unusual, been used as tools in some sort of family dispute, with the added twist that this specific domestic fracas occurred abroad.