Britain's Border Force and coastguard intercepted three small boats carrying 36 migrants in the English Channel between France and Britain on Monday.

The border agency said it responded to three separate incidents of vessels crossing the world's busiest shipping lane to reach the British coast.

The first involved 11 men who said they were Iranian — along with an Iraqi — whose craft was intercepted in the early hours of the morning. The men were taken to the English port town of Dover for medical care and to be interviewed.

Read more: UK brings in boats to patrol English Channel amid migration spike

Later in the day, 15 Iraqi men, women and children were found aboard a second boat which was intercepted by a coastguard vessel before being taken to Dungeness, where the migrants were transferred to immigration officials.

The third involved nine men and one woman from Iran, who were taken to Dover.

Over the past six months, Britain has seen a spike in the number of migrants attempting to cross the English Channel.

Almost 500 people, including dozens of children, have made the journey in small boats since early November.

Read more: France to tackle English Channel migrant crossings

In December, the British government declared the increase a "major incident."

"Anyone crossing the Channel in a small boat is taking a huge risk with their life and the lives of their children," a Home Office spokesperson said on Monday, according to British media.

The spokesperson added that the UK had agreed a joint action plan with France over the increase in migrant crossings.

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