I found this...
As a result of Durdant-Hollamby’s investigations, the Government Equalities Office has confirmed that:
1) There is not, and never has been, any law that prohibits a woman from breastfeeding a child of any age in public, for example in a cafe.
2) The 1975 Sexual Discrimination Act created legal protection for a woman under the provision of goods, facilities and services section. This protection covered a woman breastfeeding a child, of any age, by implication, and meant that she could not be discriminated against for breastfeeding in places such as restaurants, cafes, surgeries, libraries etc.
3) The 2008 amendment to the SDA brought in more specific cover under the wording of ‘maternity’ - this also brought in the first mention of a six-month period, as it is tied to broader maternity rights covering 6 months before and after birth - whereby a mother could also challenge the owner under the grounds of maternity
4) The Equality Bill seeks to make it even more explicit that this maternity protection includes breastfeeding, by including the word breastfeeding in the statute.
So, for example, if a mother who is breastfeeding a 27 week old baby on a bus or in a café is asked to leave or to stop breastfeeding, she can take legal action on the grounds of sexual discrimination. If that same mother was feeding a child under 26 weeks, she could take action under the grounds of maternity or sexual discrimination.