The British population will touch 72.5 million in mid -2010 – with the nearly five million almost complete due to immigration.
Official projections show that the numbers must rise from 67.6 million in mid -2022, although the deaths will fully compensate for the births.
Net migration is expected to amount to a total of 4.9 million for the 10 years to 2032.
The number of births and deaths in the period is expected to be almost identical, with around 6.8 million births compensated by 6.8 million deaths.
Although the births are expected to increase somewhat, the dead are also expected to rise due to the relatively large number of people who reach older ages born during the 'Baby Boom' after the Second World War.
The level of net migration is expected to an average of 340,000 per year from mid -2028, lower than the current level.
Spokesperson James Robards told us: 'The British population is expected to grow by almost 5 million in the coming decade.
'The cause of this growth is migration, with natural change – the difference between births and deaths – which is expected to be around zero.
'These projections are based on current and earlier trends and are no predictions about what will happen or not in the future.
'Our latest projections also emphasize an increasingly aging population, with the number of people older than 85 years that they will double almost 3.3 million in 2047. expectation. '
