- 7 updates
The British Government should increase the Royal Navy's presence in Gibraltar in response to Spanish incursions into its territorial waters, Chief Minister Fabian Picardo has said.
Mr Picardo said the latest alleged incursion - a Spanish research vessel ignoring requests to leave the territory's waters for 20 hours - was a "security issue that Spain needs to be aware of".
He told BBC Radio 4's Today programme that he was "in favour of anything that has a positive deterrent effect" but that "diplomatic aspects must be equally important".
The Foreign Office has accused a Spanish survey ship of acting unlawfully and provocatively by sailing into British waters around Gibraltar.
This evening it responded by summoning the Spanish Ambassador - for the third time in two years - to explain the alleged incursion.
ITV News Europe Correspondent Emma Murphy reports:
A spokesman for the Ministry of Defence (MoD) has said that the Royal Navy took "proportionate responses" after a Spanish vessel allegedly entered British waters off the coast of Gibraltar:
This is the third time the Spanish Ambassador has been publicly summoned in relation to Gibraltar since the current Spanish government took office in December 2011.
An MP raised the issue of the alleged incursion by a Spanish vessel into British waters in a Westminster Hall debate earlier today, describing it as "a very serious incident".
Labour MP Jim Dobbin asked: "Is a minister from the Foreign Office coming to make a statement on what is a very, very serious incident?"
Deputy Speaker Lindsay Hoyle replied: "I've been given no notification of a statement to be made but I'm sure the Foreign Office is listening very carefully to what you've just said on such a serious incident."
This video is believed to show a Spanish vessel - the RV Ramon Margalef - in British waters off the coast of Gibraltar.
It was uploaded to YouTube yesterday and purportedly includes extracts of the radio conversation between the ship's skipper and Gibraltar authorities.
ITV News cannot independently confirm the veracity of this footage.
The Foreign Office has summoned Spain's ambassador to the UK over concerns regarding an "ongoing incuresion" by a Spanish vessel into Gibraltar waters.
The Minister for Europe, David Lidington, said: