The Department of Health and World Health Organisation recommend that mothers should be supported to breastfeed and that baby should receive no other food or drink for the first 6 months of life other than breastmilk.
If you are returning to work and still breastfeeding you are entitled to be supported by your employer.
Employees - what you must do:
Employers - what you must do:
Employers, for further information read the ACAS guide "Accommodating breastfeeding employees in the workplace"