The average British male will live 4 more years and the female 3 more years than their counterparts two decades ago, according to the U.K.'s Healthcare Commission. The rise in life expectancy was due to the significant improvements on health care services in Great Britain, but there is still room for improvement, the report said.

Healthcare Commission Chairman Professor Sir Ian Kennedy will present Tuesday the findings to Parliament. The study covered both state-run health services and private healthcare.

While there is a general trend toward longer life, in poorer areas where there are lesser general practitioners, men live 10 years lesser compared to Britons in wealthier areas like Kensington and Chelsea. Lowest life expectancy was pinpointed to Manchester for males and Liverpool for females.

The report also probed into waiting times for hospital appointment. The state benchmark is 26 weeks. Last year, 83 percent of British hospitals met the below 26-week requirement. By the end of 2008, the government wants to further cut the waiting time to a maximum of 18 weeks.

Because of the increasing lifespan in western nations, experts predicted within 25 years there will be more than 40,000 centenarians across the U.K.

What is alarming though is even as the country's lifespan keeps on improving, the natural birth rate is on the reverse course. And like many other wealthy nations, the U.K. faces a graying population with almost little or no next generation to speak of.