Britain denounced the Iranian seizure of a British-flagged oil tanker in the Gulf as a ”hostile act” on Saturday, rejecting Tehran’s explanation that it had seized the vessel because it had been involved in an accident. Defence Secretary Penny Mordaunt called the incident a “hostile act”. Foreign Secretary Jeremy Hunt said he had expressed “extreme disappointment” by phone to his counterpart, Mohammad Javad Zarif. Britain also summoned the Iranian charge d’affaires.
Source : https://www.thehindu.com/todays-paper/tp-international/a-hostile-act-says-uk/article28623533.ece