http://legal-dictionary.thefreedictionary.com/mens rea Someone has already mentioned the fancy dress side of things & whether that could be construed as impersonating a police officer. I thought that clothing/item had to be bought with the sole intent of impersonating a police officer. Or obtained by illegal means, if official items. I have the same type of vest, bought from probably the same source & to date have encountered no problems whilst wearing it. I have even asked the police, prior to using it where I stood & they could find nothing wrong. If we are going down that road, how can the choice of mobile phone be construed as impersonating a police officer. This done after helping two BTP Officers floor someone trying to get away. Sorry for asking this Maz, on your thread. Its just that two BTP Officers mistook me for CID, because of what was being worn, clothing wise.