The incursion by a Spanish ship into British waters off Gibraltar is "provocative", "unlawful" and "a violation of our sovereignty", the Europe minister David Lidington has said.
David Lidington was speaking after a Spanish state research trip entered British waters along with a vessel belonging to the Guardia Civil, the part of Spain's police force responsible for protecting the coastline.
According to the United Nations Convention on the Law of the Sea, the waters around Gibraltar are indisputably British territorial waters, under United Kingdom sovereignty, in which only the United Kingdom has the right to exercise jurisdiction.
Her Majesty's Government takes a grave view of any attempt by Spain to exert authority or control within British Gibraltar territorial waters and considers such incursions as a violation of our sovereignty.
I strongly condemn this provocative incursion and urge the Spanish government to ensure that it is not repeated.
More top news
President Obama was at his best, as he used his oratorical skills to cajole Americans to back the "most qualified" Hillary Clinton.
As Obama signed off with his last major speech in office, ITV News asked his supporters what a difference he has made in eight years.
Lloyds Banking Group is cutting 3,000 jobs and shutting 200 branches as the lender braces for a cut in interest rates, it has announced.