Unsurprised to see this thread is still running.
There are changing facilities in many accessible lavatory facilities - whether this is right or wrong and taking these spaces from the disabled who need them is an alternative question - it now seems to be commonly adopted practice.
Feeding facilities are far less widely available.
Were this country not so ridiculously coy and censorious about breastfeeding, and so ready, willing and able to condemn women for practically everything we do, seeing us culpable for all social ills or wank-fodder on display to titillate the urges of men, they wouldn't have been so necessary in the first place.
Given I have zero respect for misogynistic attitudes like these, I exercised my legal rights and breastfed in public. The only time I received a cross look or a word was ironically when I was in a more private space, my car, when a woman came right up to my window, stared down at me and scowled her disapproval. Out and about in public I received no reaction whatsoever, which is what normally tends to happen if you're not looking for one.
Not every woman is comfortable with this. These spaces are for them. Personally, I'd feel far safer and more comfortable breastfeeding in a cafeteria in the full gaze (therefore protection) of the public, than feeding in an enclosed space with the sort of man who thought it was his place, his right, and his absolute entitlement to encroach on such a place.
As my husband previously stated, the kinds of men agitating to be in women's spaces are precisely the kinds of men who have the least business to be anywhere near them.
And yes. Women's lavatory facilities and women's changing rooms are WOMEN's spaces.