There are an estimated 2,052,000 people in work aged 60 or over in Great Britain, 16.8 per cent. of the population in the age group.
These estimates are not based on the same total population estimates as headline ONS estimates for employment in the same period, but this is unlikely to have much effect on the aforementioned figures.
Labour Force Survey, Q4 2006. The Labour Force Survey is a survey of the population of private households, student halls of residence and NHS accommodation.