Asda topped The Sunday Times Top Company to Work for Survey poll in 2002, and was named Britain's best company for flexibility in 2003.
So what does Asda's flexible working package include?
Asda is aiming to increase its number of older workers by offering seasonal jobs where colleagues need only work for 10 weeks of the year.
School starter scheme
For parents wanting to take children to, or collect them from, school on their first day.
Child care leave
For parents wanting to stop work during the summer holidays and return to work later in the year.
For colleagues needing to be absent from work for family reasons.
Emergency family leave
Time off to deal with family emergencies.
Up to a week off to help with the birth of a new grandchild.
To help managers balance home and work life.
Colleagues can take a career break of up to 2 years.
For students going away to college who want time off to prepare for exams.
Store swapping schemes
For students wishing to work in their university and home towns during the year.
For colleagues to give long term care and care at home.
Paid time off for male and female colleagues going through fertility treatment.
Up to three months' leave for over 50s wanting to take a winter trip to the sun.