The government has toughened up rules making it almost impossible for a refugee who arrives in the UK on a small boat to become a British citizen.
New guidance states that anyone who enters the UK illegally having made a dangerous journey, which could be via boat, but also by means such as hiding in a vehicle, will normally be refused citizenship, regardless of the time that has passed.
In a statement, the Home Office said the strengthened measures made it clear that anyone who entered the UK illegally would face having a British citizenship application refused.