Right, DH is now looking for email addresses from H&M directors on Google as they're not that easy to find, I also agree email is faster and you can cc more people. If we can't find any I'll have to email customer services, which is the address the supervisor gave us. I entered a hyperlink where it says Equality Act 2010 in the email so that it takes them directly to the Act.
Here's the letter. I suck at writing this type of thing, so any suggestions are welcome 
I think it might be too long 
To whom it may concern,
I am writing to you to complain about an unfortunate incident that took place on Sunday 16th October 2011 at the H&M store in XXX.
We had been to the other H&M store in XXX buying some pyjamas for our daughter when we headed off to the XXX store to find some things for me. While we were there our son, who is 6 weeks old, started to cry. He had been fed before we left our house but it had already been about an hour since then.
We looked at the queue and decided that my husband would stand in line with our daughter to pay for the things we had chosen while I fed our son. I went to a quiet area of the store in order not to be in anyone?s way and I started breastfeeding the baby; this was right next to a ?staff only? door, but I made sure I was not in the middle of anything or anyone?s way.
Minutes later a member of security approached me and said someone had informed him I was there and that he had to tell me I could not breastfeed in the store. I was extremely surprised, to be honest, and my husband, who came over after paying for our items, asked him whether he was sure about that. He said yes and repeated what he had said before. My husband went on to tell him that there had been a newspaper article about exactly the same type of incident at another retailer and that he was sure what he was saying was not correct and proceeded to ask for the store supervisor.
Ms. XXX, who claimed to be the store supervisor, approached us minutes later and repeated what the security person had told us; that a member of staff had informed her of my feeding the baby and that I could not do it as ?customers didn?t like it?. Then she went on to slightly change her words and now it had not been a member of staff who had ?reported? me but a customer who had complained about me feeding the baby.
My husband again asked her whether she was sure and also told her about the article in the newspaper, but she just went on to say I could not feed the baby in the store, that it was company policy, that there were no facilities for that and that there were, in her exact words, ?cafes or Mothercares to do that?.
To be honest, I was quite shocked at the level of ignorance a store supervisor could show; not to mention her lack of sensitivity and decorum to speak to us. She always chose a rather loud tone of voice, which was completely unnecessary, and made me feel embarrassed, when I had no reason at all to feel that way.
My husband said we would have to complain with H&M head office as this was not legal. She simply told us to complain, but that I could not feed the baby in the store (by now I had already finished feeding him). My husband wanted to record her words for our complaint but she refused.
At that moment the only thing I could think of was getting out of the store as soon as I could, so I told my husband we should just leave. He demanded to have her details and she agreed to give us a customer service card and wrote her name at the back.
As a regular H&M customer I can honestly say I was extremely disappointed at this appalling demonstration of ignorance, lack of customer care, not to mention the fact that what she asked from me was/is not legal.
Pursuant to the Equality Act 2010 a woman is protected by the law and can breastfeed in public places such as parks, hospitals, shops, theatres, public transport, etc. I urge you to take a look at this Act and read it thoroughly.
It is very disappointing to see that clearly the staff at H&M have not been trained in this respect, and that maybe this same incident happens on a daily basis at your stores. Our baby is very young; at 6 weeks you cannot tell when they are going to be hungry again. Do you really think it is reasonable to ask for a mother to drop everything she has in her hands while shopping at one of your stores and, as your supervisor clearly told me, look for a café or a ?Mothercare? to feed him? Is that really what you expect women to do when they have babies/children who are breastfed and happen to be out shopping?
I was made to feel by this very unsympathetic member of staff that what I was doing was not right, that it was making other customers uncomfortable. No woman or mother should be made to feel that. Women with young babies should not be made to feel they have to geographically plan their outings with exact precision so as to drop everything at the sign of hunger from their babies to look for a place to feed their babies. Our daughter was breastfed for 18 months and I fed her anywhere and everywhere and I never experienced such an incident.
As I said before, considering myself a regular customer at H&M I was extremely disappointed. I looked at the three bags we had full of products from your store in disbelief and asked myself why I had spent our money there.
I sincerely hope you reconsider your company policy and modify it accordingly as soon as possible. What your staff have been told to do/say is not legal. You cannot ask a woman to stop breastfeeding or leave your store to breastfeed; it is completely unacceptable.
I am copying La Leche League, the Association of Breastfeeding Mothers and Breastfeeding Network in this email as well.
Looking forward to hearing from you,
Kind regards,
Gauchita.