Incidentally, BP PLC (that stands for "Public Limited Company" is incorporated and exists under and in accordance with the laws of England and Wales. It was incorporated in 1909, and its registered number is 00102498. Its registered office is in London (it also happens to be its head office but that is not the point). It was incorporated as "the British Petroleum Company Ltd". It became a PLC when that status became available as a matter of law.   It changed its name to   BP Amoco PLC in 1998 and to BP PLC in 2001.

It is an English company, regardless of who owns the shares or who the directors are, or who by any means controls it.

Is that clear now?