But it wouldn't work legally, for the following reason.
The Sex Discrimination Act prevents any leave being given to women and not men UNLESS it's for the purposes of pregnancy and childbirth. It's rooted in Health and Safety legislation (european) and is there to protect women's health post birth. There is no Sex discrimination exemption for breastfeeding.
Under the law as it is, I believe (and so do the Equal Opportunities Commission) that the current leave regime is illegal - we are just waiting for a test case.
This is why ALL other European countries provide a short period of maternity leave followed by a longer period of Parental leave. The ILO minimum standards for maternity leave is 12 week's leave.
France: 16 weeks
Spain: 16 weeks
Germany: 14 weeks
etc, etc.
We are the ONLY European country with over 18 weeks maternity pay, because ALL other European countries recognise the gender issue.
The problem with providing leave for breastfeeding (which is covered by PARENTAL leave in all other Euro countries) is twofold... firstly, it isn't covered by either European Health and Safety law OR Sex Discrimination exemptions, and secondly, what do you do with women who aren't breastfeeding beyond an initial period - i.e. the majority? Are they ineligible for the extended leave? Would women have to prove they are breastfeeding?
I agree that there should be leave provision for women who want to breastfeed - don't get me wrong - I know it's best for the child. BUT it should be part of parental leave so that couples have the choice of who does childcare and are not forced into an arrangement where women lose out on career progression, men lose out on caring opportuntities and both are forced into traditional gender roles, which most couples these days DON'T want.