Britain's National Crime Agency said the find is believed to be "the largest seizure of lethal purpose weapons at a UK port."
The British government has paid £33 million (€38 million) to Eurotunnel, which runs the Channel Tunnel between the UK and France, after the company took legal action over the process to award ferry contracts to cope with a no-deal Brexit.
With a post-Brexit deal remaining elusive, there are fears that trucks could get stuck in queues in Dover and Calais.
Brexit, it would appear, is not a new phenomenon. Scientists reveal how Britain first separated from Europe 450,000 years ago.
The summer holiday getaway was not supposed to begin in gridlock!
The security situation around Calais due to the ongoing migrant crisis was little aided by protesting French ferry workers who again severely