Complex sentence: The Basic State Pension is increased in April each year to pensioners living in the UK and also to 535,000 pensioners living in certain overseas countries which have a Social Security Agreement with the UK that includes British pension uprating.
Split into simpler sentences: The Basic State Pension is increased in April each year to pensioners living in the UK. It is also increased to 535,000 pensioners living in certain overseas countries which have a Social Security Agreement with the UK that includes British pension uprating.