100% agree. The ship might be owned by Brits, but it is flagged under another country (Liberia?). Let that country get it back.
I just did a quick internet search for British Ship Iran and got the CNN page. Yikes! It had several articles, one of which, in its lead paragraph, said "British-flagged" and in the other said "Liberian-flagged." I guess they just want to cover all their bases. Fake News CNN