article_snippet: The move was seen as a show of strength by Russia amid tensions over the conflict in Ukraine, where Prime Minister David Cameron has accused Russian President Vladimir Putin of challenging the territorial integrity of Kiev.
article_snippet: Since January last year, there have been at least 17 shows of military strength by Russia near the UK.
article_snippet: British Defence Minister Michael Fallon warned that Nato needs to be ready for 'any kind of aggression from Russia' following the incident, which came after London summoned the Russian ambassador over a similar episode in January.
article_snippet: On Tuesday, leaders of the United States, Germany, France, Britain, Italy and EU head Donald Tusk called for a 'strong reaction' from the international community to any major violation of a ceasefire in eastern Ukraine in a bid to increase pressure on Russia.
article_snippet: Both Kiev forces and pro-Russian rebels accuse the other of continuing to mount attacks in defiance of a deal forged in a bid to end 11 months of bloodshed that has killed over 6,000 people, according to the UN.
article_snippet: The move has been seen as a show of strength by Russia amid tensions over the conflict in Ukraine, where David Cameron has accused Russian President Vladimir Putin of challenging the territorial integrity of Kiev .
highlights_snippet: Incident latest in a long line of breaches of UK territory by Kremlin forces .